refactor: make permission management modal responsive

npm/ng-packs/packages/permission-management/src/lib/components/permission-management.component.html

@@ -22,7 +22,7 @@
 
       <hr class="mt-2 mb-2" />
       <div class="row">
-        <div class="col-4">
+        <div class="col-12 col-md-4">
           <ul class="nav nav-pills flex-column">
             <li *ngFor="let group of groups$ | async; trackBy: trackByFn" class="nav-item">
               <a
@@ -34,7 +34,7 @@
             </li>
           </ul>
         </div>
-        <div class="col-8">
+        <div class="col-12 col-md-8">
           <h4>{{ selectedGroup?.displayName }}</h4>
           <hr class="mt-2 mb-3" />
           <div class="pl-1 pt-1">