message: Fix popup appearance: show footer only if isModal is true
diff: data-bind="component: { name: contentComponentName, params: contentComponentData }"
  ></div>
  - <div class="sv-popup__footer">
  <!-- ko if: isModal -->
  + <div class="sv-popup__footer">
  <button
  class="sv-popup__footer-item sv-popup__button sv-popup__button--cancel"
  data-bind="click: cancel, text: cancelButtonText"
  >
  Apply
  </button>
  - <!-- /ko -->
  </div>
  + <!-- /ko -->
  </div>
  </div>
  