Have a more user-friendly display of the custom field setup hierarchy dropdown

When there is a lot of groups configured within a module's custom field setup page, it can become tedious to read and find which groups you are looking for (plus the abundance of '>>>' does not make it easier).

For those that create, edit, and/or design custom field setups, it can be tedious.

Perhaps using a searchable tree control to neatly lay out a hierarchy can be more helpful.