remove stopAllMotors on escape key

libs/core/buttons.ts

@@ -170,7 +170,6 @@ namespace brick {
         // this needs to be done in query(), which is run without the main JS execution mutex
         // otherwise, while(true){} will lock the device
         if (ret & DAL.BUTTON_ID_ESCAPE) {
-            motors.stopAllMotors();
             control.reset()
         }
         return ret