Issue #3432244 by catch, lauriii, smustgrave, nicxvan: Follow-up Split...

Issue #3432244 by catch, lauriii, smustgrave, nicxvan: Follow-up Split tablesort.module.css out to its own library and attach it via tablesort

core/themes/claro/css/classy/components/tablesort.css

@@ -6,6 +6,3 @@
 th.is-active img {
   display: inline;
 }
-td.is-active {
-  background-color: #ddd;
-}