Encapsulate common display code in a singleton (#12395)

* Encapsulate common LCD code in a singleton
* Depend more UBL code on UBL_DEVEL_DEBUGGING
  - Since most users don't need the debugging on at all times, this helps reduce the default build size for UBL by over 2K, a little closer to fitting on 128K boards.

Marlin/src/module/tool_change.cpp

@@ -540,7 +540,7 @@ void tool_change(const uint8_t tmp_extruder, const float fr_mm_s/*=0.0*/, bool n
     }
 
     #if HAS_LCD_MENU
-      lcd_return_to_status();
+      ui.return_to_status();
     #endif
 
     #if ENABLED(TOOLCHANGE_FILAMENT_SWAP)