Make the group header fit the container

templates/groups/details.tpl

@@ -1,5 +1,5 @@
 <div component="groups/container" class="details row">
-	<div class="col-xs-12" component="groups/cover" style="background-image: url({group.cover:url}); background-position: {group.cover:position};">
+	<div class="col-xs-12" component="groups/cover" style="background-origin: content-box; background-image: url({group.cover:url}); background-position: {group.cover:position};">
 		<div class="change">[[groups:cover-change]] <i class="fa fa-fw fa-pencil-square-o"></i></div>
 		<div class="save">[[groups:cover-save]] <i class="fa fa-fw fa-floppy-o"></i></div>
 		<div class="indicator">[[groups:cover-saving]] <i class="fa fa-fw fa-refresh fa-spin"></i></div>