Shows up in the Locale preferences.
Add comment that data is sorted by ID in CountryFlags.rdef.
That way it's clear what's the next ID for a new flag, you
just add it with the next ID at the end of the file.
Fixes#19494
Change-Id: I0946730d07c89001331552b5026c0003c298de4a
Reviewed-on: https://review.haiku-os.org/c/haiku/+/9140
Tested-by: Commit checker robot <[email protected]>
Reviewed-by: Adrien Destugues <[email protected]>