Add 3 new factoid properties

[ajax146]

This adds three new factoid properties:
Disabled
Protected
Restricted

Disabled completely disables a factoid from being called, but keeps it in the database
Protected prevents all edit attempts on a factoid until it is first unprotected
Restricted only allows factoids to be called from a predefined list of channels

This also moves those 3 properties, and hidden, to be only controllable by a factoids admins set of roles

This changes the way the factoids permissions checks work, and the way modifying factoids work to make the code a bit cleaner and easier to read.

Additionally, .factoid info now shows a "properties" tab that will show the 4 special factoid properties, replacing the existing hidden tab.