Add support for searching by User IDs & Username when nicked in User Selects

[TwilightZebby]

It would be nice if User Selects supported searching for Users by User ID, and showing results of Users who match the search query with their username, even though they're nicked in the Server.

Right now, User Selects do not show results when searching by a valid User ID (even though Slash Commands' User Options do).
Likewise, User Selects do not show Users who match the search query, because they are nicknamed in the Server (and thus the User Select seems to search by Nickname first, ignoring the Username. It should search both when available).

Use Case for this:
Using a User Select as part of a "Server Member Report System" on a Server, and using a User ID when the User has a hard-to-type username/nickname; or when searching by username because the username is easily typeable when the nickname isn't.