change to better (more clear) names (#8050)

set_destination_to_current() changed to set_destination_from_current()

set_current_to_destination() changed to set_current_from_destination()

Marlin/src/Marlin.cpp

@@ -502,7 +502,7 @@ void manage_inactivity(bool ignore_stepper_queue/*=false*/) {
     if (delayed_move_time && ELAPSED(ms, delayed_move_time + 1000UL) && IsRunning()) {
       // travel moves have been received so enact them
       delayed_move_time = 0xFFFFFFFFUL; // force moves to be done
-      set_destination_to_current();
+      set_destination_from_current();
       prepare_move_to_destination();
     }
   #endif