Make table responsive

app/modules/vote/templates/main.j2

@@ -11,7 +11,7 @@
                 </div>
             </div>
             <div class="card-body">
-                <table class="table table-striped table-sm">
+                <table class="table table-striped table-sm table-responsive">
                     <thead>
                         <tr>
                             <th></th>