Merge pull request DSpace#3117 from DSpace/backport-3115-to-dspace-7_x

[Port dspace-7_x] Fixes: Site hangs when selecting items via keyboard from the hamburger menu

Author: tdonohue

src/app/shared/menu/menu-item/link-menu-item.component.html

@@ -6,6 +6,6 @@
    [queryParams]="item.queryParams"
    (click)="$event.stopPropagation()"
    (keyup.space)="navigate($event)"
-   (keyup.enter)="navigate($event)"
+   (keydown.enter)="navigate($event)"
    href="javascript:void(0);"
 >{{item.text | translate}}</a>