fix(DataTable): retain active state when sort is active (#6524)

Co-authored-by: Alessandra Davila <aledavila@ibm.com>
Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>

Author: 3 people

packages/components/src/components/data-table/_data-table-sort.scss

@@ -86,6 +86,10 @@
     fill: $ui-05;
   }
 
+  .#{$prefix}--table-sort.#{$prefix}--table-sort--active {
+    background: $data-table-column-hover;
+  }
+
   // active icons
   .#{$prefix}--table-sort.#{$prefix}--table-sort--active
     .#{$prefix}--table-sort__icon-unsorted {