vidjil.less allow overflow-x for info-msg

in some cases there can be a lot of samples to view in the infoBox of a
clone, so we need a way of scrolling to see this information.

See #3057

browser/css/vidjil.less

@@ -1041,7 +1041,7 @@ a.tag-link {
 }
 
 .data-msg, .info-msg{
-  overflow-x: hidden;
+  overflow-x: auto;
   height : 100%;
   width : 100%;
 }