message: fix(secret-edit): show but disable confirm button
diff: </ion-item>
  <ion-fab vertical="bottom" horizontal="end" slot="fixed">
  - <ion-button color="primary" shape="round" *ngIf="secret.label" [disabled]="secret.label.length < 1" (click)="confirm()">
  + <ion-button color="primary" shape="round" [disabled]="secret.label.length < 1" (click)="confirm()">
  {{ 'secret-edit.confirm_label' | translate }}
  </ion-button>
  </ion-fab>
  