Adjust margin of icon-buttons

src/app/components/participant/room-participant-page/room-participant-page.component.html

@@ -31,7 +31,7 @@
         <mat-grid-tile>
           <button mat-icon-button color="primary" matTooltip="{{ 'room-page.give-feedback' | translate}}"
                   routerLink="/participant/room/{{ room.id }}/feedback-barometer">
-            <mat-icon class="smallerIcon">thumbs_up_down</mat-icon>
+            <mat-icon>thumbs_up_down</mat-icon>
           </button>
         </mat-grid-tile>
         <mat-grid-tile>

src/app/components/participant/room-participant-page/room-participant-page.component.scss

@@ -13,7 +13,7 @@ mat-card-content>:first-child {
 .mat-icon-button {
   width: 75%;
   height: 75%;
-  margin-bottom: 10px;
+  margin-bottom: 20px;
 }
 
 mat-icon {