message: fix  passed in template
diff: <h3 class="mdl-dialog__title">{{ (title || 'EDIT_TAG') | translate }}</h3>
  <form
  - (ngSubmit)="onTagUpdate($event)"
  + (ngSubmit)="onTagUpdate()"
  #tagCreationForm="ngForm"
  >
  <div class="mdl-dialog__content">
  