Add pointer-events:none to disabled pager/pagination

In line with usage of `pointer-events:none` for disabled buttons

less/pager.less

@@ -49,6 +49,7 @@
       color: @pager-disabled-color;
       background-color: @pager-bg;
       cursor: @cursor-disabled;
+      pointer-events: none; // Future-proof disabling of clicks on `<a>` elements
     }
   }
 }

less/pagination.less

@@ -71,6 +71,7 @@
       background-color: @pagination-disabled-bg;
       border-color: @pagination-disabled-border;
       cursor: @cursor-disabled;
+      pointer-events: none; // Future-proof disabling of clicks on `<a>` elements
     }
   }
 }