Allow for modification of extra fields for users, teams, leagues etc

Users, teams and leagues all have a standard set of fields that can be captured - things like "Firstname", "Lastname", "EmailAddress" etc etc etc.

It is also possible to add "extra" fields to all these things, so if you want to capture, for example, the company that a user works for, or their nationality, or where they heard about you, you can do so. However, in order to create or modify these extra fields, Spawtz staff must be involved, and therefore the turn around time for creation/modification of these requests may be less than desired.

Instead of having to involve Spawtz staff, it would be good if administrators could add/modify the extra fields themselves. That includes adding fields and modifying the values of drop down lists etc.