message: Remove br tag from progress buttons markup
diff: <ul data-bind="css: model.css.progressButtonsList">
  <!-- ko foreach: model.visiblePages -->
  <li>
  - <span data-bind="css: css.progressButtonsPageTitle, text: navigationTitle || name"></span>
  - <br>
  - <span data-bind="css: css.progressButtonsPageDescription, text: navigationDescription"></span>
  + <div data-bind="css: css.progressButtonsPageTitle, text: navigationTitle || name"></div>
  + <div data-bind="css: css.progressButtonsPageDescription, text: navigationDescription"></div>
  </li>
  <!-- /ko -->
  </ul>
  