CF feature suggestion

To whom it may concern,
I have looked in the RT wiki, which has information I could use to
code this feature (by overlays and/or ?); I didn’t find a reference to what
I am asking about in Google, but I am probably not the first to suggest it.
Here is the idea: I added a custom field called ‘Assigned to’ for tickets
s.t. in additionto Owner and Requestor, the ticket is ‘Assigned to’ someone
(a User) to work on.
I typed in the select-from values for this custom field but would have
liked to have a dropdown (as there is for Owner for instance) so that 1) RT
’knows’ these are valid User names and they correlate to core data and 2) I
don’t have to typethem again.
Do you think this is a reasonable addition, not just for our particular site
but RT in general?

To whom it may concern,
I have looked in the RT wiki, which has information I could use to
code this feature (by overlays and/or ?); I didn’t find a reference to what
I am asking about in Google, but I am probably not the first to suggest it.
Here is the idea: I added a custom field called ‘Assigned to’ for tickets
s.t. in additionto Owner and Requestor, the ticket is ‘Assigned to’ someone
(a User) to work on.
I typed in the select-from values for this custom field but would have
liked to have a dropdown (as there is for Owner for instance) so that 1) RT
’knows’ these are valid User names and they correlate to core data and 2) I
don’t have to typethem again.
Do you think this is a reasonable addition, not just for our particular site
but RT in general?

That will be in 3.8, and 3.6 if I get around to back-porting it.