Fix #432

Wrap logout button in form-group, was missing it when the button
was refactored to not require js.

templates/partials/menu.tpl

@@ -135,11 +135,13 @@
 							<li role="presentation" class="divider"></li>
 							<li component="user/logout">
 								<form method="post" action="{relative_path}/logout">
+									<div class="form-group">
 										<input type="hidden" name="_csrf" value="{config.csrf_token}">
 										<input type="hidden" name="noscript" value="true">
 										<button type="submit" class="btn btn-link">
 											<i class="fa fa-fw fa-sign-out"></i><span> [[global:logout]]</span>
 										</button>
+									</div>
 								</form>
 							</li>
 						</ul>