[PS-1222] Remove appBlurClick throughout the popup and web code (#3208)

* Remove appBlurClick throughout the popup code

`appBlurClick` leads to focus being lost/reset for assistive technology users. It should not be necessary in any case - if focus does need to move after an action, explicitly set it somewhere programmatically using `focus()` rather than relying on browser heuristics

* Remove now redundant blur-click directive

libs/angular/src/directives/blur-click.directive.ts

@@ -1,12 +0,0 @@
-import { Directive, ElementRef, HostListener } from "@angular/core";
-
-@Directive({
-  selector: "[appBlurClick]",
-})
-export class BlurClickDirective {
-  constructor(private el: ElementRef) {}
-
-  @HostListener("click") onClick() {
-    this.el.nativeElement.blur();
-  }
-}