Toolchange improvements (#16979)

Marlin/src/module/tool_change.cpp

   #endif
 #endif
 
-#if ENABLED(MAGNETIC_PARKING_EXTRUDER) || (ENABLED(PARKING_EXTRUDER) && PARKING_EXTRUDER_SOLENOIDS_DELAY > 0)
-  #include "../gcode/gcode.h" // for dwell()
+#if ENABLED(MAGNETIC_PARKING_EXTRUDER) || defined(EVENT_GCODE_AFTER_TOOLCHANGE) || (ENABLED(PARKING_EXTRUDER) && PARKING_EXTRUDER_SOLENOIDS_DELAY > 0)
+  #include "../gcode/gcode.h"
 #endif
 
 #if ANY(SWITCHING_EXTRUDER, SWITCHING_NOZZLE, SWITCHING_TOOLHEAD)
       }
     #endif // TOOLCHANGE_FILAMENT_SWAP
 
-    #if HAS_LEVELING
+    #if HAS_LEVELING && DISABLED(SINGLENOZZLE)
       // Set current position to the physical position
       TEMPORARY_BED_LEVELING_STATE(false);
     #endif
     #endif
 
     #ifdef EVENT_GCODE_AFTER_TOOLCHANGE
-      gcode.process_subcommands_now_P(EVENT_GCODE_AFTER_TOOLCHANGE);
+      if (!no_move)
+        gcode.process_subcommands_now_P(PSTR(EVENT_GCODE_AFTER_TOOLCHANGE));
     #endif
 
     SERIAL_ECHO_START();