deprecate the ModalContainerComponent

npm/ng-packs/packages/theme-shared/src/lib/components/modal/modal-container.component.ts

@@ -1,10 +1,11 @@
 import { Component, ViewChild, ViewContainerRef } from '@angular/core';
 
+/**
+ * @deprecated To be removed in v5.0
+ */
 @Component({
   selector: 'abp-modal-container',
-  template: `
+  template: ` <ng-container #container></ng-container> `,
-    <ng-container #container></ng-container>
-  `,
 })
 export class ModalContainerComponent {
   @ViewChild('container', { static: true, read: ViewContainerRef })