fixed preview in search

templates/macros.html

@@ -2,7 +2,7 @@
 <li class="list-group-item">
 	<a class="hidden-xs" href="{{url_for('lecture', id=lecture['id'])}}" title="{{ lecture['coursetitle'] }}" style="color: #000">
 		<div class="row">
-			<img class="col-xs-4" src="{{ config.VIDEOPREFIX }}/{{ lecture['titlefile'] }}" alt="Vorschaubild">
+			<img class="col-xs-4" style="max-height: 100px; width: auto;" src="{{ config.VIDEOPREFIX }}/{{ lecture['titlefile'] }}" alt="Vorschaubild">
 			<div class="col-xs-4">
 				<span><strong>{{ lecture['short'] }}</strong></span><br>
 				<span>{{ lecture['time'] }}</span>