Create "disabled" status for sponsors

[appakz]

As an event organizer responsible for sponsors, I need to be able to flag a sponsor as "disabled" (or maybe "pending") as a way for me to hide them from the list of sponsors, but still let me keep track of their info in the site. This workflow might look like:

1- A new sponsor indicates that they want to donate.
2- Sponsorship coordinator enters their info into the site, but leaves them as "disabled" or "pending"
3- That sponsor's data is in the site, but not visible to non-admin users when viewing the sponsorship list.
4- When the sponsorship is finalized (i.e. you get the money from them), an admin user can mark that sponsor as "active" and they show up like they normally would.

[appakz]

Done.