ui: scoreboard overflow if problems too many (#223)

packages/ui-default/templates/contest_scoreboard.html

@@ -12,7 +12,7 @@
         <span class="icon icon-download"></span> {{ _('Export as CSV') }}
       </a>
     </div>
-    <div class="section__body no-padding">
+    <div class="section__body no-padding overflow-hidden-horizontal">
       <table class="data-table">
         <colgroup>
         {%- for column in rows[0] -%}