Fix dragscroll inside swimlanes

client/components/swimlanes/swimlanes.jade

@@ -2,7 +2,7 @@ template(name="swimlane")
   .swimlane.nodragscroll
     +swimlaneHeader
   unless collapseSwimlane
-    .swimlane.js-lists.js-swimlane(id="swimlane-{{_id}}"
+    .swimlane.js-lists.js-swimlane.dragscroll(id="swimlane-{{_id}}"
                                    style="height:{{swimlaneHeight}};")
       if isMiniScreen
         if currentListIsInThisSwimlane _id