Add ripple everywhere.

frontend/src/app/components/submit-button/submit-button.component.html

@@ -1,7 +1,8 @@
 <button type="submit"
         class="cod-button {{color}}"
         [disabled]="disabled || requestPending"
-        (click)="click.emit()">
+        (click)="click.emit()"
+        matRipple>
     @if (requestPending) {
         <mat-spinner class="spinner {{color}}" [diameter]="25"></mat-spinner>
     }