Fix desktop swimlane drag handle position.

Thanks to xet7 !

Related #2081

client/components/swimlanes/swimlanes.styl

@@ -55,7 +55,7 @@
       padding: 7px
       top: 50%
       transform: translateY(-50%)
-      left: 300px
+      left: 230px
       font-size: 18px
 
     .swimlane-header-miniscreen-handle