SPR-908: all z-indices are found in base_structure.less,

SPR-908: Bugfix Direct-nav in Tableview should be above toggle button

css/plugins/tabinclude.less

@@ -34,7 +34,6 @@ div#dwpl-ti-container {
 
             &.selected {
                 position: relative;
-                z-index: 1; // put .slected tab above div.dwpl-ti-content-box
                 background-color: @ini_background;
                 color: @ini_text;
             }