Correct toolbar positionnement for tabs

Author: SamyPesse

client/resources/stylesheets/components/tabs.less

@@ -217,10 +217,10 @@
             top: 0px;
             left: 0px;
             right: 0px;
-            height: 20px;
+            height: 30px;
             margin: 0px;
             padding: 0px;
-            z-index: 2;
+            z-index: 3;
         }
 
         .tab-panel-inner {