message: Center OAuth confirmation toast
diff: -<mat-card fxLayoutAlign="center" class="important-box">
  +<div fxLayoutAlign="center">
  + <mat-card class="important-box">
  <div>
  <h3>{{"TITLE_LOGIN" | translate}}</h3>
  <div>{{"CONFIRM_LOGGED_IN_VIA_OAUTH2" | translate}}</div>
  </div>
  </mat-card>
  +</div>
  