change filament issue

make a more general solution

Marlin/Marlin_main.cpp

 #endif
 float homing_feedrate[] = HOMING_FEEDRATE;
 bool axis_relative_modes[] = AXIS_RELATIVE_MODES;
+bool ignore_blocks_queued = false;
 int feedmultiply=100; //100->1 200->2
 int saved_feedmultiply;
 int extrudemultiply=100; //100->1 200->2
         while(!lcd_clicked()){
           cnt++;
           manage_heater();
+		  ignore_blocks_queued = true;
           manage_inactivity();
+		  ignore_blocks_queued = false;
           lcd_update();
           if(cnt==0)
           {
   if(stepper_inactive_time)  {
     if( (millis() - previous_millis_cmd) >  stepper_inactive_time )
     {
-      if(blocks_queued() == false) {
+      if(blocks_queued() == false && ignore_blocks_queued != true) {
         disable_x();
         disable_y();
         disable_z();