message: Hide server start message when `application.showChallengeSolvedNotifications` is false
diff: <h1 class="hidden" ng-bind="applicationName"></h1><!-- for SEO -->
  <div class="container" ng-controller="ServerStartedNotificationController">
  - <div uib-alert ng-show="autoRestoreMessage" ng-class="'alert alert-warning'" close="closeNotification()">
  + <div uib-alert ng-show="showCtfFlagsInNotifications && autoRestoreMessage" ng-class="'alert alert-warning'" close="closeNotification()">
  <span translate="NOTIFICATION_SERVER_STARTED"></span>: {{autoRestoreMessage}}
  </div>
  </div>
  