Set alert dialog on top of dialogs

smp-angular/src/app/app.component.html

+<alert #alertMessage ></alert>
 <div style="display:flex; flex-direction: column;height: 100%">
   <window-toolbar #windowToolbar/>
   <mat-drawer-container id="smp-window" [hasBackdrop]="false" style="flex: 1 1 auto;">
@@ -13,8 +14,7 @@
       </div>
     </mat-drawer>
     <mat-drawer-content (scroll)="onDrawerContentScroll($event);">
-      <alert #alertMessage></alert>
-        <router-outlet></router-outlet>
+      <router-outlet></router-outlet>
     </mat-drawer-content>
   </mat-drawer-container>
 </div>

smp-angular/src/app/common/panels/membership-panel/membership-panel.component.ts

@@ -173,7 +173,6 @@ export class MembershipPanelComponent implements BeforeLeaveGuard {
         member: member,
       }
     }).afterClosed().subscribe(value => {
-
       this.refresh();
     });
   }