This script allows you to reorder the dynamic (user) attributes in the Channel Box. Executing
this script will open a window with a list of attributes that can be reordered. Simply select the
ones you want to move and click the Up or Down button.
Solved a bug that occured when user attrs of complex types (compound etc..) were present.
This allows usage of this script on animUI nodes.
The popup menus are now marking menus for faster usage
Changed the reordering method so that it is more reliable and works with linux