fix property grid

Author: jogibear9988

packages/web-component-designer/package.json

@@ -1,7 +1,7 @@
 {
  "description": "A WYSIWYG designer webcomponent for html components",
  "name": "@node-projects/web-component-designer",
- "version": "0.1.284",
+ "version": "0.1.285",
  "type": "module",
  "main": "./dist/index.js",
  "author": "jochen.kuehner@gmx.de",

packages/web-component-designer/src/elements/widgets/propertyGrid/PropertyGrid.ts

@@ -74,7 +74,7 @@ export class PropertyGrid extends BaseCustomWebComponentLazyAppend {
  public set instanceServiceContainer(value: InstanceServiceContainer) {
  this._instanceServiceContainer = value;
  this._selectionChangedHandler?.dispose()
- if (this.instanceServiceContainer) {
+ if (this._instanceServiceContainer) {
  this._selectionChangedHandler = this._instanceServiceContainer.selectionService.onSelectionChanged.on(e => {
  this.selectedItems = e.selectedElements;
  });