message: small styling adjustment
diff: <div class="mat-typography">
  <h1><span>{{title}}</span></h1>
  <div class="text-justify" [innerHtml]="message"></div>
  + <div>
  <button
  *ngIf="showHackingInstructor"
  mat-raised-button color="warn"
  (click)="startHackingInstructor()"
  [matTooltip]="('SCORE_BOARD_HACKING_INSTRUCTOR' | translate)"
  - matTooltipPosition="above"
  - >
  + matTooltipPosition="above">
  <mat-icon>
  school
  </mat-icon>
  <span fxShow fxHide.lt-lg translate>BTN_GETTING_STARTED</span>
  </button>
  - <button mat-raised-button class="close-dialog" (click)="closeWelcome()" color="primary" aria-label="Close Welcome Banner">
  + <button mat-raised-button class="close-dialog" (click)="closeWelcome()" color="primary"
  + aria-label="Close Welcome Banner">
  <mat-icon>
  visibility_off
  </mat-icon>
  <span fxShow fxHide.lt-sm translate>BTN_DISMISS</span>
  </button>
  </div>
  +</div>
  