message: Hide "or"-separator line when Google login is unavailable
diff: <mat-checkbox [formControl]="rememberMe" id="rememberMe"> {{'REMEMBER_ME' | translate}}</mat-checkbox>
  - <div class="breakLine">
  + <div class="breakLine" *ngIf="!oauthUnavailable">
  <div class="line"><div></div></div>
  <div class="textOnLine" translate>LABEL_OR</div>
  <div class="line"><div></div></div>
  