swap cursor not-allow for default, and use a variable for all disabled elements

less/pagination.less

@@ -69,7 +69,7 @@
       color: @pagination-disabled-color;
       background-color: @pagination-disabled-bg;
       border-color: @pagination-disabled-border;
-      cursor: not-allowed;
+      cursor: @cursor-disabled;
     }
   }
 }