fix #101 Filter UI is not updated after all filters are removed

Author: kknoppe

src/main/js/bundles/dn_querybuilder/FilterActionDefinitionFactory.ts

@@ -93,6 +93,7 @@ export default class FilterActionDefinitionFactory {
                         break;
                     case "resetFilterAction":
                         ref.definitionExpression = ref._initialDefinitionExpression;
+                        ref._complexQuery = undefined;
                         break;
                 }
             }