Fix Visual Micro "Arduino IDE for Visual Studio" support (#16418)

Marlin/src/lcd/menu/menu.cpp

@@ -213,7 +213,7 @@ void MenuItem_bool::action(PGM_P const, bool * const ptr, screenFunc_t callback)
 ///////////////// Menu Tree ////////////////
 ////////////////////////////////////////////
 
-#include "../../Marlin.h"
+#include "../../MarlinCore.h"
 
 bool printer_busy() {
   return planner.movesplanned() || printingIsActive();

Marlin/src/lcd/menu/menu_tune.cpp

@@ -32,7 +32,7 @@
 #include "../../module/motion.h"
 #include "../../module/planner.h"
 #include "../../module/temperature.h"
-#include "../../Marlin.h"
+#include "../../MarlinCore.h"
 
 #if HAS_LEVELING
   #include "../../feature/bedlevel/bedlevel.h"