[CL-104] fix overlay + virtual scroll view recycling bug (#6179)

* close menu overlay when no longer visible

* prevent infinite loop in fallback-src directive

* block scrolling when menu is open

* disable view recycling; use reposition strategy

apps/web/src/app/vault/components/vault-items/vault-items.component.html

@@ -58,7 +58,7 @@
       </tr>
     </ng-container>
     <ng-template body let-rows$>
-      <ng-container *cdkVirtualFor="let item of rows$">
+      <ng-container *cdkVirtualFor="let item of rows$; templateCacheSize: 0">
         <tr
           *ngIf="item.collection"
           bitRow

libs/angular/src/directives/fallback-src.directive.ts

@@ -6,9 +6,15 @@ import { Directive, ElementRef, HostListener, Input } from "@angular/core";
 export class FallbackSrcDirective {
   @Input("appFallbackSrc") appFallbackSrc: string;
 
+  /** Only try setting the fallback once. This prevents an infinite loop if the fallback itself is missing. */
+  private tryFallback = true;
+
   constructor(private el: ElementRef) {}
 
   @HostListener("error") onError() {
-    this.el.nativeElement.src = this.appFallbackSrc;
+    if (this.tryFallback) {
+      this.el.nativeElement.src = this.appFallbackSrc;
+      this.tryFallback = false;
+    }
   }
 }