Add a typedef for MENU_ITEM(function,…) functions

Marlin/src/lcd/ultralcd.cpp

   void _menu_action_back();
   void menu_action_submenu(screenFunc_t data);
   void menu_action_gcode(const char* pgcode);
-  void menu_action_function(screenFunc_t data);
+  void menu_action_function(menuAction_t data);
 
   #define DECLARE_MENU_EDIT_TYPE(_type, _name) \
     bool _menu_edit_ ## _name(); \

Marlin/src/lcd/ultralcd.h

 
     // Function pointer to menu functions.
     typedef void (*screenFunc_t)();
+    typedef void (*menuAction_t)();
 
     void lcd_goto_screen(screenFunc_t screen, const uint32_t encoder=0);