More custom field revisions

[Gervase Markham]

Joel Peshkin wrote:
> One item that is missing for me is the ability to designate group 
> controls on who gets to see a custom field and who gets to edit it.  Is 
> this something that is of general interest or a strange local hack for me?

I'd consider it pretty weird if you had the rights to see the bug but 
not the field within it. As I understand it, we seem to be trying to 
avoid ("insiders" excepted) having different bits of individual bugs 
appear and disappear.

Gerv