Merge pull request #11861 from freeman/master

Issue #11852 : create a new variable for the list group active item link...

less/list-group.less

@@ -79,7 +79,7 @@ a.list-group-item {
       color: inherit;
     }
     .list-group-item-text {
-      color: lighten(@list-group-active-bg, 40%);
+      color: @list-group-link-text-active-color;
     }
   }
 }

less/variables.less

@@ -510,7 +510,7 @@
 
 @list-group-link-color:          #555;
 @list-group-link-heading-color:  #333;
-
+@list-group-link-text-active-color: lighten(@list-group-active-bg, 40%);
 
 // Panels
 // -------------------------