changes header levels for a11y

TNL-6347

common/lib/xmodule/xmodule/css/html/display.scss

@@ -15,7 +15,6 @@ h2 {
   font: normal 1.2em/1.2em $sans-serif;
   letter-spacing: 1px;
   margin-bottom: ($baseline*0.75);
-  text-transform: uppercase;
   -webkit-font-smoothing: antialiased;
 }
 
@@ -289,4 +288,4 @@ th {
       }
     }
   }
-}
+}

common/static/common/templates/discussion/new-post.underscore

@@ -1,5 +1,5 @@
 <form class="forum-new-post-form">
-    <h3 class="thread-title"><%- gettext("Add a Post") %></h3>
+    <h2 class="thread-title"><%- gettext("Add a Post") %></h2>
     <% if (mode === 'inline') { %>
         <button class="btn-default add-post-cancel">
             <span class="sr"><%- gettext('Cancel') %></span>

common/static/common/templates/discussion/thread-edit.underscore

@@ -1,4 +1,4 @@
-<h3 class="thread-title"><%- gettext("Editing post") %></h3>
+<h2 class="thread-title"><%- gettext("Editing post") %></h2>
 <ul class="post-errors"></ul>
 <div class="forum-edit-post-form-wrapper"></div>
 <div class="post-field">

common/static/common/templates/discussion/thread-show.underscore

@@ -17,7 +17,7 @@
             </div>
         <% } %>
         <div class="post-header-content">
-            <h4 class="post-title"><%- title %></h4>
+            <h2 class="post-title"><%- title %></h2>
             <p class="posted-details">
             <%
             var timeAgoHtml = interpolate(

common/static/common/templates/discussion/thread.underscore

@@ -24,7 +24,7 @@
             </div>
             <% if (can_create_comment && !readOnly) { %>
             <form class="discussion-reply-new" data-id="<%- id %>">
-                <h4><%- gettext("Add a response:") %></h4>
+                <h3><%- gettext("Add a response:") %></h3>
                 <ul class="discussion-errors"></ul>
                 <div class="reply-body" data-id="<%- id %>"></div>
                 <div class="reply-post-control">

common/test/acceptance/pages/lms/course_wiki.py

@@ -45,7 +45,7 @@ class CourseWikiPage(CoursePage):
         """
         Return the name of the article
         """
-        return str(self.q(css='.main-article h1').text[0])
+        return str(self.q(css='.main-article .entry-title').text[0])
 
 
 class CourseWikiSubviewPage(CoursePage):  # pylint: disable=abstract-method