openproject/frontend/app/templates/components/notification-box.html

<div class="notification-box{{' -' + content.className}}">
  <a data-ng-click="remove" data-ng-if="removable()" class="notification-box--close">&times;</a>
  <div class="notification-box--content">
    <p>{{content.message}}</p>
    <div data-ng-switch="content.type" data-ng-if="typeable()">
      <div data-ng-switch-when="upload">
        <ul class="notification-box--uploads" data-ng-show="content.uploads.length > 0">
          <upload-notification data-upload="upload" data-ng-repeat="upload in content.uploads"></upload-notification>
        </ul>
      </div>
      <div data-ng-switch-when="success">
        <!-- create another button -->
      </div>
      <div data-ng-switch-when="error">
        <!-- continue editing button -->
      </div>
    </div>
  </div>
</div>