feat: add extra button slot in AEditDialog

src/components/generic/AEditDialog.vue

@@ -19,6 +19,7 @@
           <button type="button" class="btn" :disabled="isSaving" @click="dialog.close()">
             {{ cancelLabel ?? t('cancel') }}
           </button>
+          <slot name="footer-buttons-extra" :is-saving="isSaving" />
         </div>
       </slot>
     </template>