Merge pull request #130 from cloudspace/67569114_zindex_filterbar_issue

Fix z-index filter bar issue

Author: Nicholas Thomson

app/styles/main.less

@@ -886,7 +886,7 @@ footer {
     z-index: 100;
   }
   .movable.affix-top {
-    position: static;
+    position: relative;
   }
   .movable.affix {
     position: fixed;