Misc changes about form inputs.

frontend/src/app/components/publication-edition/publication-edition.component.html

@@ -92,7 +92,7 @@
         </mat-tab>
     </mat-tab-group>
     <footer>
-        <app-submit-button label="Save" [requestPending]="!!(isSaving$ | async)" i18n-label></app-submit-button>
+        <app-submit-button [requestPending]="!!(isSaving$ | async)" i18n>Save</app-submit-button>
         <button type="button" class="secondary" (click)="goPreviousLocation()" i18n>
             Cancel
         </button>

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

@@ -1,8 +1,11 @@
-<button type="submit" [class]="color" [disabled]="disabled || requestPending" (click)="click.emit()">
+<button type="submit"
+        class="cod-button {{color}}"
+        [disabled]="disabled || requestPending"
+        (click)="click.emit()">
     @if (requestPending) {
         <mat-spinner class="spinner {{color}}" [diameter]="25"></mat-spinner>
     }
     <span>
-        {{ label }}
+        <ng-content/>
     </span>
 </button>