ux: tabs update

public/sass/_variables.scss

@@ -232,5 +232,5 @@ $dashboard-padding: $panel-margin * 2;
 $panel-padding: 0px 10px 5px 10px;
 
 // tabs
-$tabs-padding: 10px 15px 10px;
+$tabs-padding: 9px 15px 9px;
 

public/sass/components/_tabbed_view.scss

@@ -12,8 +12,10 @@
 }
 
 .tabbed-view-header {
+  background: $page-header-bg;
+  box-shadow: $page-header-shadow;
+  border-bottom: 1px solid $page-header-border-color;
   @include clearfix();
-  @include brand-bottom-border();
 }
 
 .tabbed-view-title {