message: Fix for qr aspect ratio on mobiles
diff: <div class="uk-width-1-1">
  <textarea [(ngModel)]="input" rows="5" class="uk-input uk-margin-small-bottom" placeholder="Text to be converted into QR" (keyup)="generateQR()" maxlength="2000"></textarea>
  </div>
  - <img *ngIf="qrCodeImageBlock" [src]="qrCodeImageBlock" class="block-qr" alt="QR code" [ngStyle]="{'width': width+'px'}">
  + <div class="block-qr" [ngStyle]="{'width': width+'px'}">
  + <img *ngIf="qrCodeImageBlock" [src]="qrCodeImageBlock" alt="QR code">
  + </div>
  </div>
  </div>
  </div>
  