clear_block_buffer, kill_current_block in quick_stop

Marlin/src/module/stepper.cpp

@@ -2083,10 +2083,11 @@ void Stepper::finish_and_disable() {
 }
 
 void Stepper::quick_stop() {
-  cleaning_buffer_counter = 5000;
   DISABLE_STEPPER_DRIVER_INTERRUPT();
-  while (planner.has_blocks_queued()) planner.discard_current_block();
+  kill_current_block();
   current_block = NULL;
+  cleaning_buffer_counter = 5000;
+  planner.clear_block_buffer();
   ENABLE_STEPPER_DRIVER_INTERRUPT();
   #if ENABLED(ULTRA_LCD)
     planner.clear_block_buffer_runtime();