Initialize motorDriver in STACK instead of HEAP, pointer

Since moving all objects to heap encoder started to lag
interrupt not recognizing some single events in MENU

fast executen of motordriver setTarget caused the lag,
initialize it in STACK while still using a pointer now

common/motorctl.cpp

@@ -19,7 +19,7 @@ void task_motorctl( void * task_motorctl_parameters ){
     while(1){
     	objects->motorRight->handle();
     	objects->motorLeft->handle();
-        vTaskDelay(20 / portTICK_PERIOD_MS);
+        vTaskDelay(10 / portTICK_PERIOD_MS);
     }
 }