Added delete system bundle liquid_level_widgets when updated

application/src/main/java/org/thingsboard/server/service/install/DefaultSystemDataLoaderService.java

@@ -534,6 +534,7 @@ public class DefaultSystemDataLoaderService implements SystemDataLoaderService {
         this.deleteSystemWidgetBundle("count_widgets");
         this.deleteSystemWidgetBundle("status_indicators");
         this.deleteSystemWidgetBundle("outdoor_environment");
+        this.deleteSystemWidgetBundle("liquid_level_widgets");
         installScripts.loadSystemWidgets();
     }