Multiple PID parameter edit for ultralcd

* Depending on extruder count, will add menu items for ultralcd to edit
individual PID parameters for each extruder
* Added menu items to each language_xx.h
* Builds OK, but recommend testing with typical LCD

Marlin/language_ca.h

 #define MSG_PID_I                           "PID-I"
 #define MSG_PID_D                           "PID-D"
 #define MSG_PID_C                           "PID-C"
+#define MSG_PID_P1                          "PID-P E2"
+#define MSG_PID_I1                          "PID-I E2"
+#define MSG_PID_D1                          "PID-D E2"
+#define MSG_PID_C1                          "PID-C E2"
+#define MSG_PID_P2                          "PID-P E3"
+#define MSG_PID_I2                          "PID-I E3"
+#define MSG_PID_D2                          "PID-D E3"
+#define MSG_PID_C2                          "PID-C E3"
 #define MSG_ACC                             "Accel"
 #define MSG_VXY_JERK                        "Vxy-jerk"
 #define MSG_VZ_JERK                         "Vz-jerk"

Marlin/language_de.h

 #define MSG_PID_I                           "PID-I"
 #define MSG_PID_D                           "PID-D"
 #define MSG_PID_C                           "PID-C"
+#define MSG_PID_P1                          "PID-P E2"
+#define MSG_PID_I1                          "PID-I E2"
+#define MSG_PID_D1                          "PID-D E2"
+#define MSG_PID_C1                          "PID-C E2"
+#define MSG_PID_P2                          "PID-P E3"
+#define MSG_PID_I2                          "PID-I E3"
+#define MSG_PID_D2                          "PID-D E3"
+#define MSG_PID_C2                          "PID-C E3"
 #define MSG_ACC                             "Acc"
 #define MSG_VXY_JERK                        "Vxy-jerk"
 #define MSG_VZ_JERK                         "Vz-jerk"

Marlin/language_en.h

 #define MSG_PID_I                           "PID-I"
 #define MSG_PID_D                           "PID-D"
 #define MSG_PID_C                           "PID-C"
+#define MSG_PID_P1                          "PID-P E2"
+#define MSG_PID_I1                          "PID-I E2"
+#define MSG_PID_D1                          "PID-D E2"
+#define MSG_PID_C1                          "PID-C E2"
+#define MSG_PID_P2                          "PID-P E3"
+#define MSG_PID_I2                          "PID-I E3"
+#define MSG_PID_D2                          "PID-D E3"
+#define MSG_PID_C2                          "PID-C E3"
 #define MSG_ACC                             "Accel"
 #define MSG_VXY_JERK                        "Vxy-jerk"
 #define MSG_VZ_JERK                         "Vz-jerk"

Marlin/language_es.h

 #define MSG_PID_I                           "PID-I"
 #define MSG_PID_D                           "PID-D"
 #define MSG_PID_C                           "PID-C"
+#define MSG_PID_P1                          "PID-P E2"
+#define MSG_PID_I1                          "PID-I E2"
+#define MSG_PID_D1                          "PID-D E2"
+#define MSG_PID_C1                          "PID-C E2"
+#define MSG_PID_P2                          "PID-P E3"
+#define MSG_PID_I2                          "PID-I E3"
+#define MSG_PID_D2                          "PID-D E3"
+#define MSG_PID_C2                          "PID-C E3"
 #define MSG_ACC                             "Acel"
 #define MSG_VXY_JERK                        "Vxy-jerk"
 #define MSG_VZ_JERK                         "Vz-jerk"

Marlin/language_eu.h

 #define MSG_PID_I                           "PID-I"
 #define MSG_PID_D                           "PID-D"
 #define MSG_PID_C                           "PID-C"
+#define MSG_PID_P1                          "PID-P E2"
+#define MSG_PID_I1                          "PID-I E2"
+#define MSG_PID_D1                          "PID-D E2"
+#define MSG_PID_C1                          "PID-C E2"
+#define MSG_PID_P2                          "PID-P E3"
+#define MSG_PID_I2                          "PID-I E3"
+#define MSG_PID_D2                          "PID-D E3"
+#define MSG_PID_C2                          "PID-C E3"
 #define MSG_ACC                             "Azelerazioa"
 #define MSG_VXY_JERK                        "Vxy-astindua"
 #define MSG_VZ_JERK                         "Vz-astindua"

Marlin/language_fi.h

 #define MSG_PID_I                           "PID-I"
 #define MSG_PID_D                           "PID-D"
 #define MSG_PID_C                           "PID-C"
+#define MSG_PID_P1                          "PID-P E2"
+#define MSG_PID_I1                          "PID-I E2"
+#define MSG_PID_D1                          "PID-D E2"
+#define MSG_PID_C1                          "PID-C E2"
+#define MSG_PID_P2                          "PID-P E3"
+#define MSG_PID_I2                          "PID-I E3"
+#define MSG_PID_D2                          "PID-D E3"
+#define MSG_PID_C2                          "PID-C E3"
 #define MSG_ACC                             "Kiihtyv"
 #define MSG_VXY_JERK                        "Vxy-jerk"
 #define MSG_VZ_JERK                         "Vz-jerk"

Marlin/language_fr.h

 #define MSG_PID_I                           "PID-I"
 #define MSG_PID_D                           "PID-D"
 #define MSG_PID_C                           "PID-C"
+#define MSG_PID_P1                          "PID-P E2"
+#define MSG_PID_I1                          "PID-I E2"
+#define MSG_PID_D1                          "PID-D E2"
+#define MSG_PID_C1                          "PID-C E2"
+#define MSG_PID_P2                          "PID-P E3"
+#define MSG_PID_I2                          "PID-I E3"
+#define MSG_PID_D2                          "PID-D E3"
+#define MSG_PID_C2                          "PID-C E3"
 #define MSG_ACC                             "Accel"
 #define MSG_VXY_JERK                        "Vxy-jerk"
 #define MSG_VZ_JERK                         "Vz-jerk"

Marlin/language_it.h

 #define MSG_PID_I                           "PID-I"
 #define MSG_PID_D                           "PID-D"
 #define MSG_PID_C                           "PID-C"
+#define MSG_PID_P1                          "PID-P E2"
+#define MSG_PID_I1                          "PID-I E2"
+#define MSG_PID_D1                          "PID-D E2"
+#define MSG_PID_C1                          "PID-C E2"
+#define MSG_PID_P2                          "PID-P E3"
+#define MSG_PID_I2                          "PID-I E3"
+#define MSG_PID_D2                          "PID-D E3"
+#define MSG_PID_C2                          "PID-C E3"
 #define MSG_ACC                             "Accel."
 #define MSG_VXY_JERK                        "Vxy-jerk"
 #define MSG_VZ_JERK                         "Vz-jerk"

Marlin/language_nl.h

 #define MSG_PID_I                           "PID-I"
 #define MSG_PID_D                           "PID-D"
 #define MSG_PID_C                           "PID-C"
+#define MSG_PID_P1                          "PID-P E2"
+#define MSG_PID_I1                          "PID-I E2"
+#define MSG_PID_D1                          "PID-D E2"
+#define MSG_PID_C1                          "PID-C E2"
+#define MSG_PID_P2                          "PID-P E3"
+#define MSG_PID_I2                          "PID-I E3"
+#define MSG_PID_D2                          "PID-D E3"
+#define MSG_PID_C2                          "PID-C E3"
 #define MSG_ACC                             "Versn"
 #define MSG_VXY_JERK                        "Vxy-jerk"
 #define MSG_VZ_JERK                         "Vz-jerk"

Marlin/language_pl.h

 #define MSG_PID_I                           "PID-I"
 #define MSG_PID_D                           "PID-D"
 #define MSG_PID_C                           "PID-C"
+#define MSG_PID_P1                          "PID-P E2"
+#define MSG_PID_I1                          "PID-I E2"
+#define MSG_PID_D1                          "PID-D E2"
+#define MSG_PID_C1                          "PID-C E2"
+#define MSG_PID_P2                          "PID-P E3"
+#define MSG_PID_I2                          "PID-I E3"
+#define MSG_PID_D2                          "PID-D E3"
+#define MSG_PID_C2                          "PID-C E3"
 #define MSG_ACC                             "Przyspieszenie"
 #define MSG_VXY_JERK                        "Zryw Vxy"
 #define MSG_VZ_JERK                         "Zryw Vz"

Marlin/language_pt.h

 #define MSG_PID_I                           "PID-I: "
 #define MSG_PID_D                           "PID-D: "
 #define MSG_PID_C                           "PID-C: "
+#define MSG_PID_P1                          "PID-P E2: "
+#define MSG_PID_I1                          "PID-I E2: "
+#define MSG_PID_D1                          "PID-D E2: "
+#define MSG_PID_C1                          "PID-C E2: "
+#define MSG_PID_P2                          "PID-P E3: "
+#define MSG_PID_I2                          "PID-I E3: "
+#define MSG_PID_D2                          "PID-D E3: "
+#define MSG_PID_C2                          "PID-C E3: "
 #define MSG_ACC                             "Acc:"
 #define MSG_VXY_JERK                        "Vxy-jerk: "
 #define MSG_VZ_JERK                         "Vz-jerk"

Marlin/language_ru.h

 #define MSG_PID_I                           "PID-I: "
 #define MSG_PID_D                           "PID-D: "
 #define MSG_PID_C                           "PID-C: "
+#define MSG_PID_P1                          "PID-P E2: "
+#define MSG_PID_I1                          "PID-I E2: "
+#define MSG_PID_D1                          "PID-D E2: "
+#define MSG_PID_C1                          "PID-C E2: "
+#define MSG_PID_P2                          "PID-P E3: "
+#define MSG_PID_I2                          "PID-I E3: "
+#define MSG_PID_D2                          "PID-D E3: "
+#define MSG_PID_C2                          "PID-C E3: "
 #define MSG_ACC                             "Acc:"
 #define MSG_VXY_JERK                        "Vxy-jerk: "
 #define MSG_VZ_JERK                         "Vz-jerk"

Marlin/ultralcd.cpp

 int32_t minEditValue, maxEditValue;
 menuFunc_t callbackFunc;
 
-// place-holders for Ki and Kd edits
+// place-holders for Ki and Kd edits, and the extruder # being edited
 float raw_Ki, raw_Kd;
+int pid_current_extruder;
 
 static void lcd_goto_menu(menuFunc_t menu, const uint32_t encoder=0, const bool feedback=true) {
   if (currentMenu != menu) {
 
 static void lcd_control_temperature_menu()
 {
-#ifdef PIDTEMP
-    // set up temp variables - undo the default scaling
-    raw_Ki = unscalePID_i(Ki);
-    raw_Kd = unscalePID_d(Kd);
-#endif
-
     START_MENU();
     MENU_ITEM(back, MSG_CONTROL, lcd_control_menu);
 #if TEMP_SENSOR_0 != 0
     MENU_ITEM_EDIT(float32, MSG_FACTOR, &autotemp_factor, 0.0, 1.0);
 #endif
 #ifdef PIDTEMP
-    MENU_ITEM_EDIT(float52, MSG_PID_P, &Kp, 1, 9990);
-    // i is typically a small value so allows values below 1
-    MENU_ITEM_EDIT_CALLBACK(float52, MSG_PID_I, &raw_Ki, 0.01, 9990, copy_and_scalePID_i);
-    MENU_ITEM_EDIT_CALLBACK(float52, MSG_PID_D, &raw_Kd, 1, 9990, copy_and_scalePID_d);
+	// set up temp variables - undo the default scaling
+	pid_current_extruder = 0;
+	raw_Ki = unscalePID_i(Ki[0]);
+	raw_Kd = unscalePID_d(Kd[0]);
+	MENU_ITEM_EDIT(float52, MSG_PID_P, &Kp[0], 1, 9990);
+	// i is typically a small value so allows values below 1
+	MENU_ITEM_EDIT_CALLBACK(float52, MSG_PID_I, &raw_Ki, 0.01, 9990, copy_and_scalePID_i);
+	MENU_ITEM_EDIT_CALLBACK(float52, MSG_PID_D, &raw_Kd, 1, 9990, copy_and_scalePID_d);
 # ifdef PID_ADD_EXTRUSION_RATE
-    MENU_ITEM_EDIT(float3, MSG_PID_C, &Kc, 1, 9990);
+	MENU_ITEM_EDIT(float3, MSG_PID_C, &Kc[0], 1, 9990);
 # endif//PID_ADD_EXTRUSION_RATE
+#if EXTRUDERS > 1
+	// set up temp variables - undo the default scaling
+	pid_current_extruder = 1;
+	raw_Ki = unscalePID_i(Ki[1]);
+	raw_Kd = unscalePID_d(Kd[1]);
+	MENU_ITEM_EDIT(float52, MSG_PID_P1, &Kp[1], 1, 9990);
+	// i is typically a small value so allows values below 1
+	MENU_ITEM_EDIT_CALLBACK(float52, MSG_PID_I1, &raw_Ki, 0.01, 9990, copy_and_scalePID_i);
+	MENU_ITEM_EDIT_CALLBACK(float52, MSG_PID_D1, &raw_Kd, 1, 9990, copy_and_scalePID_d);
+# ifdef PID_ADD_EXTRUSION_RATE
+	MENU_ITEM_EDIT(float3, MSG_PID_C1, &Kc[1], 1, 9990);
+# endif//PID_ADD_EXTRUSION_RATE	
+#endif//EXTRUDERS > 1
+#if EXTRUDERS > 2
+	// set up temp variables - undo the default scaling
+	pid_current_extruder = 2;
+	raw_Ki = unscalePID_i(Ki[2]);
+	raw_Kd = unscalePID_d(Kd[2]);
+	MENU_ITEM_EDIT(float52, MSG_PID_P2, &Kp[2], 1, 9990);
+	// i is typically a small value so allows values below 1
+	MENU_ITEM_EDIT_CALLBACK(float52, MSG_PID_I2, &raw_Ki, 0.01, 9990, copy_and_scalePID_i);
+	MENU_ITEM_EDIT_CALLBACK(float52, MSG_PID_D2, &raw_Kd, 1, 9990, copy_and_scalePID_d);
+# ifdef PID_ADD_EXTRUSION_RATE
+	MENU_ITEM_EDIT(float3, MSG_PID_C2, &Kc[2], 1, 9990);
+# endif//PID_ADD_EXTRUSION_RATE	
+#endif//EXTRUDERS > 2
 #endif//PIDTEMP
     MENU_ITEM(submenu, MSG_PREHEAT_PLA_SETTINGS, lcd_control_temperature_preheat_pla_settings_menu);
     MENU_ITEM(submenu, MSG_PREHEAT_ABS_SETTINGS, lcd_control_temperature_preheat_abs_settings_menu);
 void copy_and_scalePID_i()
 {
 #ifdef PIDTEMP
-  Ki = scalePID_i(raw_Ki);
+  Ki[pid_current_extruder] = scalePID_i(raw_Ki);
   updatePID();
 #endif
 }
 void copy_and_scalePID_d()
 {
 #ifdef PIDTEMP
-  Kd = scalePID_d(raw_Kd);
+  Kd[pid_current_extruder] = scalePID_d(raw_Kd);
   updatePID();
 #endif
 }