I've tested in both HL2DM and GMod, but contrary to what the thread poster said, in both games the weapon switcher fades out and closes. In fact, it auto-closes twice as quickly as TTT's weapon switcher. So disabling the auto-close is not going to be default.
Guess I must have been mistaken (perhaps I've downloaded some add-on that changed the normal function at some point), but I still thank you very much. Just tonight I've seen 3-4 accidental discharges by innocents and one by a detective. This will be very much welcomed.
Definitely switching it to on as soon as I can.
Now I'll be able to switch weapons without worry there'll be all sorts of new usefulness (e.g. putting mousewheel over deagle/primary while holstered for quickdraw).
Thank you!