Replace browser confirmations with confirmation dialog

frontend/src/app/components/tenants-page/tenants-page.html

@@ -63,6 +63,8 @@
                 "
                 [deleting]="!!tenant.id && workspace.deletingTenantIds().has(tenant.id)"
                 [deleteError]="tenant.id ? (workspace.tenantDeleteErrors()[tenant.id] ?? '') : ''"
+                [deletingAttachmentIds]="workspace.deletingAttachmentIds()"
+                [attachmentDeleteErrors]="workspace.attachmentDeleteErrors()"
                 [downloadingAttachmentIds]="workspace.downloadingAttachmentIds()"
                 [attachmentDownloadErrors]="workspace.attachmentDownloadErrors()"
                 (editRequested)="openEditForm($event)"
@@ -73,6 +75,9 @@
                 (attachmentDownloadRequested)="
                   workspace.downloadTenantAttachment($event.tenantId, $event.attachment)
                 "
+                (attachmentDeleteRequested)="
+                  workspace.deleteTenantAttachment($event.tenantId, $event.attachment)
+                "
               />
             }
           </div>