How to Make Sitcky Item in Select List?
If it is an option you want to consider, you could use a convention for your select list values like so:


01-Apple.
02-Orange.
03-Raspberry.
00-TBD.


The sorted version of this list would look like so:


00-TBD.
01-Apple.
02-Orange.
03-Raspberry.


It's what I often do for any software where I somehow want to overrule the whatever sorting (eg to ensure my most often used folder names are always at the top) ... And it works in pretty much every OS I ever used (including mainframes ...)