Fix duplicate save and cancel buttons in Studio

STUD-1531

Also add support for refreshing the modal on custom save

cms/templates/component.html

@@ -1,32 +1,6 @@
 <%! from django.utils.translation import ugettext as _ %>
 <%namespace name='static' file='static_content.html'/>
 
-<div class="wrapper wrapper-component-editor">
-    <div class="component-editor">
-        <div class="component-edit-header">
-            <span class="component-name"></span>
-            <ul class="nav-edit-modes">
-                <li id="editor-mode" class="mode active-mode" aria-controls="editor-tab" role="tab">
-                    <a href="#">${_("Editor")}</a>
-                </li>
-                <li id="settings-mode" class="mode active-mode" aria-controls="settings-tab" role="tab">
-                    <a href="#">${_("Settings")}</a>
-                </li>
-            </ul>
-        </div> <!-- Editor Header -->
-
-        <div class="component-edit-modes">
-            <div class="module-editor"/>
-        </div>
-        ## Native XBlocks render their own save/cancel buttons
-        % if show_save_cancel:
-        <div class="row module-actions">
-            <a href="#" class="save-button action-primary action">${_("Save")}</a>
-            <a href="#" class="cancel-button action-secondary action">${_("Cancel")}</a>
-        </div> <!-- Module Actions-->
-        % endif
-  </div>
-</div>
 <div class="wrapper wrapper-component-action-header">
     <div class="component-header">
     ${label}