Styling to make it clearer where the editor is

IPython/html/templates/texteditor.html

@@ -1,55 +1,60
 {% extends "page.html" %}
 
 {% block title %}{{page_title}}{% endblock %}
 
 {% block stylesheet %}
 <link rel="stylesheet" href="{{ static_url('components/codemirror/lib/codemirror.css') }}">
 <link rel="stylesheet" href="{{ static_url('components/codemirror/addon/dialog/dialog.css') }}">
+<style>
+#texteditor-container {
+    border-bottom: 1px solid #ccc;
+}
+</style>
 
 {{super()}}
 {% endblock %}
 
 {% block params %}
 
 data-base-url="{{base_url}}"
 data-file-path="{{file_path}}"
 
 {% endblock %}
 
 {% block site %}
 
 <div id="menubar-container" class="container">
 <div id="menubar">
     <div id="menus" class="navbar navbar-default" role="navigation">
         <div class="container-fluid">
             <button type="button" class="btn btn-default navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
               <i class="fa fa-bars"></i>
               <span class="navbar-text">Menu</span>
             </button>
             <ul class="nav navbar-nav navbar-right">
               <li id="notification_area"></li>
             </ul>
             <div class="navbar-collapse collapse">
               <ul class="nav navbar-nav">
                 <li class="dropdown"><a href="#" class="dropdown-toggle" data-toggle="dropdown">File</a>
                     <ul id="file_menu" class="dropdown-menu">
                         <li id="save_file"><a href="#">Save</a></li>
                     </ul>
                 </li>
               </ul>
             </div>
         </div>
     </div>
 </div>
 </div>
 
-<div id="texteditor-container"></div>
+<div id="texteditor-container" class="container"></div>
 
 {% endblock %}
 
 {% block script %}
 
     {{super()}}
 
 <script src="{{ static_url("texteditor/js/main.js") }}" type="text/javascript" charset="utf-8"></script>
 {% endblock %}