Fix: sorted column will have highlighted column, sortable columns will highlight on hover

NzbDrone.Web/Content/Grid.css

@@ -82,4 +82,12 @@
 
 .grid-container {
     overflow: hidden;
-}
+}
+
+table.dataTable thead th.sorting_disabled {
+    cursor:default;
+}
+
+table.dataTable thead th.sorting_desc, table.dataTable thead th.sorting_asc, table.dataTable thead th.sorting:hover {
+    background-color: #e7efff;
+}