Fix issue with votes on small screen

app/modules/vote/templates/vote/view.j2

@@ -38,7 +38,7 @@
 </table>
 <div class="row">
 	{% for question in ballot.questions %}
-	<div class="col-6 mb-4">
+	<div class="col-md-6 mb-4">
 		<div class="card">
 			<div class="card-body">
 			    <h5 class="card-title">{{ question.name }}</h5>