Add ripple everywhere.

frontend/src/app/pages/publication/publication.component.html

@@ -12,6 +12,7 @@
                     <a [routerLink]="['edit']"
                         class="button action"
                         matTooltip="Click to edit the publication"
+                        matRipple
                         i18n-matTooltip>
                         <mat-icon>edit</mat-icon>
                     </a>
@@ -33,6 +34,7 @@
                         (click)="deletePublication()"
                         matTooltip="Click to delete the publication" 
                         matTooltipPosition="left"
+                        matRipple
                         i18n-matTooltip>
                         <mat-icon>delete</mat-icon>
                         Delete