Add Settings Popup

src/app/app.html

@@ -1,2 +1,8 @@
 <header-menu></header-menu>
 <router-outlet />
+
+<div id="global-popup-root" class="popup-outlet">
+  @for (popup of popupService.activePopups(); track popup) {
+    <ng-container *ngComponentOutlet="popup" />
+  }
+</div>