Cleanup LCD interface, add lcd_reset_status

Marlin/G26_Mesh_Validation_Tool.cpp

     // ask the user to resolve the issue
     lcd_setstatusPGM(PSTR("Release button"), 99); // will never appear...
     while (ubl_lcd_clicked()) idle();             // unless this loop happens
-    lcd_setstatusPGM(PSTR(""), -1);
+    lcd_reset_status();
 
     return true;
   }
     }
 
     #if ENABLED(ULTRA_LCD)
-      lcd_setstatusPGM(PSTR(""), -1);
+      lcd_reset_status();
       lcd_quick_feedback();
     #endif
 

Marlin/ubl_G29.cpp

   extern float destination[XYZE], current_position[XYZE];
 
   void lcd_return_to_status();
-  bool lcd_clicked();
-  void lcd_implementation_clear();
   void lcd_mesh_edit_setup(float initial);
   float lcd_mesh_edit();
   void lcd_z_offset_edit_setup(float);
   #define SIZE_OF_LITTLE_RAISE 1
   #define BIG_RAISE_NOT_NEEDED 0
 
-  extern void lcd_status_screen();
-  typedef void (*screenFunc_t)();
-  extern void lcd_goto_screen(screenFunc_t screen, const uint32_t encoder = 0);
-  extern void lcd_setstatus(const char* message, const bool persist);
-  extern void lcd_setstatusPGM(const char* message, const int8_t level);
-
   int    unified_bed_leveling::g29_verbose_level,
          unified_bed_leveling::g29_phase_value,
          unified_bed_leveling::g29_repetition_cnt,
         do_blocking_move_to_z(measured_z);  // Get close to the bed, but leave some space so we don't damage anything
                                             // The user is not going to be locking in a new Z-Offset very often so
                                             // it won't be that painful to spin the Encoder Wheel for 1.5mm
-        lcd_implementation_clear();
+        lcd_refresh();
         lcd_z_offset_edit_setup(measured_z);
 
         KEEPALIVE_STATE(PAUSED_FOR_USER);
 
         state.z_offset = measured_z;
 
-        lcd_implementation_clear();
+        lcd_refresh();
         restore_ubl_active_state_and_leave();
       }
     }
 
     SERIAL_PROTOCOLPGM("Place shim under nozzle");
     LCD_MESSAGEPGM("Place shim & measure"); // TODO: Make translatable string
-    lcd_goto_screen(lcd_status_screen);
+    lcd_return_to_status();
     echo_and_take_a_measurement();
 
     const float z1 = measure_point_with_encoder();
     do_blocking_move_to_z(Z_CLEARANCE_BETWEEN_PROBES);
     do_blocking_move_to_xy(lx, ly);
 
-    lcd_goto_screen(lcd_status_screen);
+    lcd_return_to_status();
     mesh_index_pair location;
     do {
       location = find_closest_mesh_point_of_type(INVALID, lx, ly, USE_NOZZLE_AS_REFERENCE, NULL, false);
 
       if (do_ubl_mesh_map) display_map(g29_map_type);  // show the user which point is being adjusted
 
-      lcd_implementation_clear();
+      lcd_refresh();
 
       lcd_mesh_edit_setup(new_z);
 
 
       z_values[location.x_index][location.y_index] = new_z;
 
-      lcd_implementation_clear();
+      lcd_refresh();
 
     } while (location.x_index >= 0 && --g29_repetition_cnt > 0);
 

Marlin/ultralcd.cpp

   lcd_implementation_status_screen();
 }
 
+void lcd_reset_status() { lcd_setstatusPGM(PSTR(""), -1); }
+
 /**
  *
  * draw the kill screen
  */
 void kill_screen(const char* lcd_msg) {
   lcd_init();
-  lcd_setalertstatuspgm(lcd_msg);
+  lcd_setalertstatusPGM(lcd_msg);
   #if ENABLED(DOGLCD)
     u8g.firstPage();
     do {
         card.startFileprint();
         print_job_timer.start();
       #endif
-      lcd_setstatusPGM(PSTR(""), -1);
+      lcd_reset_status();
     }
 
     void lcd_sdcard_stop() {
   lcd_finishstatus(level > 0);
 }
 
-void lcd_setalertstatuspgm(const char * const message) {
+void lcd_setalertstatusPGM(const char * const message) {
   lcd_setstatusPGM(message, 1);
   #if ENABLED(ULTIPANEL)
     lcd_return_to_status();

Marlin/ultralcd.h

   bool lcd_hasstatus();
   void lcd_setstatus(const char* message, const bool persist=false);
   void lcd_setstatusPGM(const char* message, const int8_t level=0);
+  void lcd_setalertstatusPGM(const char* message);
   void lcd_status_printf_P(const uint8_t level, const char * const fmt, ...);
-  void lcd_setalertstatuspgm(const char* message);
   void lcd_reset_alert_level();
   void lcd_kill_screen();
   void kill_screen(const char* lcd_msg);
     void bootscreen();
   #endif
 
-  #define LCD_MESSAGEPGM(x) lcd_setstatusPGM(PSTR(x))
-  #define LCD_ALERTMESSAGEPGM(x) lcd_setalertstatuspgm(PSTR(x))
-
   #define LCD_UPDATE_INTERVAL 100
 
   #if ENABLED(ULTIPANEL)
   #endif
 
 #else // no LCD
+
   inline void lcd_update() {}
   inline void lcd_init() {}
   inline bool lcd_hasstatus() { return false; }
   inline void lcd_setstatus(const char* const message, const bool persist=false) { UNUSED(message); UNUSED(persist); }
   inline void lcd_setstatusPGM(const char* const message, const int8_t level=0) { UNUSED(message); UNUSED(level); }
+  inline void lcd_setalertstatusPGM(const char* message) { UNUSED(message); }
   inline void lcd_status_printf_P(const uint8_t level, const char * const fmt, ...) { UNUSED(level); UNUSED(fmt); }
   inline void lcd_buttons_update() {}
   inline void lcd_reset_alert_level() {}
   inline bool lcd_detected() { return true; }
   inline void lcd_refresh() {}
 
-  #define LCD_MESSAGEPGM(x) NOOP
-  #define LCD_ALERTMESSAGEPGM(x) NOOP
-
 #endif // ULTRA_LCD
 
+#define LCD_MESSAGEPGM(x)      lcd_setstatusPGM(PSTR(x))
+#define LCD_ALERTMESSAGEPGM(x) lcd_setalertstatusPGM(PSTR(x))
+
+void lcd_reset_status();
+
 #if ENABLED(AUTO_BED_LEVELING_UBL)
   void lcd_mesh_edit_setup(float initial);
   float lcd_mesh_edit();