studio - made all page heading chrome have consistent markup

cms/templates/edit_subsection.html

@@ -16,6 +16,34 @@
 <%namespace name='datetime' module='datetime'/>
 
 <%block name="content">
+<div class="wrapper-mast wrapper">
+  <header class="mast has-actions">
+    <div class="title">
+      <nav class="nav-hierarchy">
+        <ul>
+          <li class="nav-item">
+            <a href="#">Section Name</a>
+          </li>
+        </ul>
+      </nav>
+
+      <h1 class="title-1">Subsection Name</h1>
+    </div>
+
+    <nav class="nav-actions">
+      <h3 class="sr">Unit Actions</h3>
+      <ul>
+        <li class="nav-item">
+          <a href="#">Preview Drafts</a>
+        </li>
+        <li class="nav-item">
+          <a href="#">View Live</a>
+        </li>
+      </ul>
+    </nav>    
+  </header>
+</div>
+
 <div class="main-wrapper">
   <div class="inner-wrapper">
     <div class="main-column">