message: fix narrow view "cancel payment" button not working
diff: <div
  class="merchant-mode-exit uk-flex uk-flex-middle uk-hidden@s"
  style="margin-top: 70px;"
  - (click)="merchantModeHideQR"
  + (click)="merchantModeHideQR()"
  >
  <span uk-icon="icon: close; ratio: 1.4;" class="uk-margin-small-right" style="margin-top: 2px;"></span>
  <span class="label">Cancel Payment</span>
  