🐛 TM3D fixes and improvements

Co-Authored-By: InsanityAutomation <38436470+InsanityAutomation@users.noreply.github.com>

Marlin/src/core/serial.h

 // Serial redirection
 //
 // Step 1: Find out what the first serial leaf is
-#if BOTH(HAS_MULTI_SERIAL, SERIAL_CATCHALL)
+#if HAS_MULTI_SERIAL && defined(SERIAL_CATCHALL)
   #define _SERIAL_LEAF_1 MYSERIAL
 #else
   #define _SERIAL_LEAF_1 MYSERIAL1

Marlin/src/lcd/dwin/e3v2/dwin.cpp

 #include "../../../libs/buzzer.h"
 
 void HMI_AudioFeedback(const bool success=true) {
-  if (success) {
-    buzzer.tone(100, 659);
-    buzzer.tone(10, 0);
-    buzzer.tone(100, 698);
-  }
-  else
-    buzzer.tone(40, 440);
+  #if HAS_BUZZER
+    if (success) {
+      buzzer.tone(100, 659);
+      buzzer.tone(10, 0);
+      buzzer.tone(100, 698);
+    }
+    else
+      buzzer.tone(40, 440);
+  #endif
 }
 
 /* Prepare */

Marlin/src/lcd/extui/ftdi_eve_touch_ui/cocoa_press/leveling_menu.cpp

 #include "../config.h"
 #include "../screens.h"
 
-#ifdef COCOA_LEVELING_MENU
+#if ENABLED(COCOA_LEVELING_MENU)
 
-#if BOTH(HAS_BED_PROBE,BLTOUCH)
+#if BOTH(HAS_BED_PROBE, BLTOUCH)
   #include "../../../../feature/bltouch.h"
 #endif
 

Marlin/src/lcd/extui/ui_api.cpp

     return isPrinting() && (isPrintingFromMediaPaused() || print_job_timer.isPaused());
   }
 
-  bool isMediaInserted() { return TERN0(SDSUPPORT, IS_SD_INSERTED() && card.isMounted()); }
+  bool isMediaInserted() { return TERN0(SDSUPPORT, IS_SD_INSERTED()); }
 
   void pausePrint()  { ui.pause_print(); }
   void resumePrint() { ui.resume_print(); }

Marlin/src/pins/ramps/pins_RAMPS.h

 
       #define BEEPER_PIN             EXP1_10_PIN
       #define BTN_ENC                EXP1_09_PIN
-      #define SD_DETECT_PIN          EXP2_04_PIN
+      #ifndef SD_DETECT_PIN
+        #define SD_DETECT_PIN        EXP2_04_PIN
+      #endif
 
       #ifndef KILL_PIN
         #define KILL_PIN             EXP2_03_PIN

Marlin/src/pins/stm32f1/pins_BTT_SKR_CR6.h

 //
 // Misc. Functions
 //
-#define LED_CONTROL_PIN                     PA13
+#define CASE_LIGHT_PIN                      PA13
 
 #ifndef NEOPIXEL_PIN
   #define NEOPIXEL_PIN                      PA8
 #endif
+
+#define SUICIDE_PIN                         PC13
+#ifndef SUICIDE_PIN_INVERTING
+  #define SUICIDE_PIN_INVERTING             false
+#endif