Add confirmation step to Init EEPROM

Marlin/src/lcd/ultralcd.cpp

     lcd_completion_feedback();
   }
 
+  #if ENABLED(EEPROM_SETTINGS)
+
+    static void lcd_init_eeprom() {
+      lcd_factory_settings();
+      settings.save();
+      lcd_goto_previous_menu();
+    }
+
+    static void lcd_init_eeprom_confirm() {
+      START_MENU();
+      MENU_BACK(MSG_CONTROL);
+      MENU_ITEM(function, MSG_INIT_EEPROM, lcd_init_eeprom);
+      END_MENU();
+    }
+
+  #endif
+
   void lcd_control_menu() {
     START_MENU();
     MENU_BACK(MSG_MAIN);
     #endif
     MENU_ITEM(function, MSG_RESTORE_FAILSAFE, lcd_factory_settings);
     #if ENABLED(EEPROM_SETTINGS)
-      MENU_ITEM(gcode, MSG_INIT_EEPROM, PSTR("M502\nM500"));
+      MENU_ITEM(submenu, MSG_INIT_EEPROM, lcd_init_eeprom_confirm);
     #endif
 
     END_MENU();