[rt-users] CF appears after update even without SeeCustomField rights

[David Good]

I've found an issue in two separate 3.8.8 installations.  Both have one
or more CustomFields that are not supposed to be visible to most users. 
The CF is managed entirely by Scrips to contain extra information not
needed by users.  In one installation, it contains the Cost Center of
the Requestor. In the other, there's a flag used to enable suppression
of notifications when a ticket is resolved and another flag used to mark
a ticket as 'urgent'.

When using the web interface (i.e. via the 'Basics' or 'Jumbo' tab), the
CF doesn't appear intially but after an update is made to any item and
saved, the CustomField appear.