Fix for bug 102141: SECURITY FIX - the Product popup menu on the show_bug form listed all products, even if the user didn't
have access to all of them.  It now only shows products the user has access to (and the product the bug is in, if the user is
viewing it because of some other override)
Patch by George Hotelling <george.hotelling@iconideas.com> and Dave Miller <justdave@syndicomm.com>
r= bbaetz, caillon