fix text in template to show edit button when user has edit permission

cadasta/templates/spatial/location_detail.html

@@ -12,7 +12,7 @@
       <h2 class="short"><span>{% trans "Location" %} </span>{{ location.name }}</h2>
       <div class="top-btn pull-right">
         <!-- Action buttons -->
-        {% if is_allowed_update_location %}
+        {% if is_allowed_edit_location %}
           <a class="btn btn-default btn-action btn-sm" href="{% url 'locations:edit' object.organization.slug object.slug location.id %}" title="{% trans 'Edit location' %}" aria-label="{% trans 'Edit location' %}"><span class="glyphicon glyphicon-pencil"></span></a>
         {% endif %}
         {% if is_allowed_delete_location %}