message: Refactored setting getPanelRemoveButtonCss class for
diff: <!-- ko component: { name: survey.getElementWrapperComponentName(question), params: { componentData: survey.getElementWrapperComponentData(question), templateData: { name: question.koElementType, data: question, afterRender: $parent.koPanelAfterRender } } } -->
  <!-- /ko -->
  <!-- /ko -->
  - <button
  - type="button"
  + <button type="button"
  data-bind="visible: question.koCanRemovePanel() && $data.state != 'collapsed', click:question.koRemovePanelClick, css: question.getPanelRemoveButtonCss()">
  <span data-bind="css: question.koCss().buttonRemoveText, text: question.panelRemoveText"></span>
  <span data-bind="css: question.koCss().iconRemove"></span>
  <!-- /ko -->
  <!-- /ko -->
  <!-- /ko -->
  - <button
  - type="button"
  - data-bind="visible: question.koCanRemovePanel, click: question.koRemovePanelClick, css: question.koCss().button + ' ' + question.koCss().buttonRemove">
  + <button type="button"
  + data-bind="visible: question.koCanRemovePanel, click: question.koRemovePanelClick, css: question.getPanelRemoveButtonCss()">
  <span data-bind="css: question.koCss().buttonRemoveText, text: question.panelRemoveText"></span>
  <span data-bind="css: question.koCss().iconRemove"></span>
  </button>
  