Added main nav to logged in pages

app/templates/views/edit-template.html

@@ -1,20 +1,18 @@
-{% extends "admin_template.html" %}
+{% extends "withnav_template.html" %}
 
 {% block page_title %}
 GOV.UK Notify | Edit template
 {% endblock %}
 
-{% block content %}
+{% block maincolumn_content %}
+
 
-<div class="grid-row">
-	<div class="column-two-thirds">
 		<h1 class="heading-xlarge">Edit template</h1>
 
 		<p>Here's where you can edit an exiting template (including delete) or add a new one</p>
 
   	<p><a href="manage-templates">Back to manage templates</a></p>
 
-	</div>
-</div>
+
 
 {% endblock %}