sticky swimlane

client/components/swimlanes/swimlanes.styl

@@ -44,6 +44,8 @@
   flex-direction: row
   overflow: 0;
   max-height: calc(100% - 26px)
+  position: sticky
+  left: 0;
 
   &.placeholder
     background-color: rgba(0, 0, 0, .2)