Merge pull request #15474 from open-craft/mtyaka/chromeless-class

Add chromeless class to the wrapper when in chromeless mode.

lms/templates/courseware/courseware-chromeless.html

@@ -69,7 +69,7 @@ ${HTML(fragment.foot_html())}
 
 </%block>
 
-<div class="course-wrapper">
+<div class="course-wrapper chromeless">
   <section class="course-content" id="course-content">
       <main id="main" tabindex="-1" aria-label="Content">
         ${HTML(fragment.body_html())}