message: Add flow panel title style in knockout
diff: <script type="text/html" id="survey-flowpanel">
  <div data-bind="style:{ width: renderWidth }, attr: {id: id}, css: cssClasses.panel.container">
  - <h4 data-bind="visible: (processedTitle.length > 0)">
  + <h4 data-bind="visible: (processedTitle.length > 0), css: cssClasses.panel.title">
  <!-- ko template: { name: 'survey-string', data: locTitle } -->
  <!-- /ko -->
  </h4>
  