Fix MKS LVGL UI retraction

Marlin/src/lcd/extui/mks_ui/draw_extrusion.cpp

@@ -55,17 +55,17 @@ static void event_handler(lv_obj_t *obj, lv_event_t event) {
   if (event != LV_EVENT_RELEASED) return;
   switch (obj->mks_obj_id) {
     case ID_E_ADD:
-      if (thermalManager.degHotend(uiCfg.extruderIndex) >= EXTRUDE_MINTEMP) {
+      if (thermalManager.hotEnoughToExtrude(uiCfg.extruderIndex)) {
         sprintf_P((char *)public_buf_l, PSTR("G91\nG1 E%d F%d\nG90"), uiCfg.extruStep, 60 * uiCfg.extruSpeed);
         queue.inject(public_buf_l);
         extrudeAmount += uiCfg.extruStep;
         disp_extru_amount();
       }
       break;
     case ID_E_DEC:
-      if (thermalManager.degHotend(uiCfg.extruderIndex) >= EXTRUDE_MINTEMP) {
+      if (thermalManager.hotEnoughToExtrude(uiCfg.extruderIndex)) {
         sprintf_P((char *)public_buf_l, PSTR("G91\nG1 E%d F%d\nG90"), 0 - uiCfg.extruStep, 60 * uiCfg.extruSpeed);
-        queue.enqueue_one_now(public_buf_l);
+        queue.inject(public_buf_l);
         extrudeAmount -= uiCfg.extruStep;
         disp_extru_amount();
       }