108588: Fixed accessibility issues on ds-comcol-page-browse-by

Author: alexandrevryghem

src/app/shared/comcol/comcol-page-browse-by/comcol-page-browse-by.component.html

@@ -2,9 +2,11 @@ <h2 class="comcol-browse-label h5">{{'browse.comcol.head' | translate}}</h2>
 <nav *ngIf="(allOptions$ | async) as allOptions" class="comcol-browse mb-4" aria-label="Browse Community or Collection">
   <div class="d-none d-sm-block">
 
-    <div class="list-group list-group-horizontal">
+    <div class="list-group list-group-horizontal" role="tablist">
       <a *ngFor="let option of allOptions"
+         [attr.aria-current]="(currentOption$ | async)?.id === option.id"
          class="list-group-item"
+         role="tab"
          [routerLink]="option.routerLink"
          [queryParams]="option.params"
          [class.active]="(currentOption$ | async)?.id === option.id">