Merge pull request #5313 from thinkyhead/rc_fix_menu_actions

Keep drawing menu unless screen changes

Marlin/ultralcd.cpp

 
   #define START_MENU() \
     START_SCREEN_OR_MENU(1); \
+    screen_changed = false; \
     NOMORE(encoderTopLine, encoderLine); \
     if (encoderLine >= encoderTopLine + LCD_HEIGHT - TALL_FONT_CORRECTION) { \
       encoderTopLine = encoderLine - (LCD_HEIGHT - TALL_FONT_CORRECTION - 1); \
 
   #define _MENU_ITEM_PART_2(TYPE, ...) \
         menu_action_ ## TYPE(__VA_ARGS__); \
-        return; \
+        if (screen_changed) return; \
       } \
     } \
     ++_thisItemNr
 
   menuPosition screen_history[10];
   uint8_t screen_history_depth = 0;
+  bool screen_changed;
 
   // LCD and menu clicks
   bool lcd_clicked, wait_for_unclick, defer_return_to_status;
         lcd_set_custom_characters(screen == lcd_status_screen);
       #endif
       lcdDrawUpdate = LCDVIEW_CALL_REDRAW_NEXT;
+      screen_changed = true;
     }
   }
 
   void lcd_return_to_status() { lcd_goto_screen(lcd_status_screen); }
 
-  inline void lcd_save_previous_menu() {
+  void lcd_save_previous_screen() {
     if (screen_history_depth < COUNT(screen_history)) {
       screen_history[screen_history_depth].menu_function = currentScreen;
       screen_history[screen_history_depth].encoder_position = encoderPosition;
     void menu_edit_ ## _name () { _menu_edit_ ## _name(); } \
     void menu_edit_callback_ ## _name () { if (_menu_edit_ ## _name ()) (*callbackFunc)(); } \
     void _menu_action_setting_edit_ ## _name (const char* pstr, _type* ptr, _type minValue, _type maxValue) { \
-      lcd_save_previous_menu(); \
+      lcd_save_previous_screen(); \
       \
       lcdDrawUpdate = LCDVIEW_CLEAR_CALL_REDRAW; \
       \
    *
    */
   void _menu_action_back() { lcd_goto_previous_menu(); }
-  void menu_action_submenu(screenFunc_t func) { lcd_save_previous_menu(); lcd_goto_screen(func); }
+  void menu_action_submenu(screenFunc_t func) { lcd_save_previous_screen(); lcd_goto_screen(func); }
   void menu_action_gcode(const char* pgcode) { enqueue_and_echo_commands_P(pgcode); }
   void menu_action_function(screenFunc_t func) { (*func)(); }