Specify release version option for SteamCMD games

[zhiyan114]

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• I have searched for an existing feature request matching the description.

Feature Description

So after updating one of the SteamCMD application, I realize that the game had introduced breaking change that would negatively impact the overall gameplay. Adding ManifestID as one of the Steam Downloads option would not only solve that (by reverting version), but also allows us to pull any other versions of the server file if needed.

Expected feature behavior:
User specify ManifestID -> Press Update -> Only that version of the server file will be pulled until the textbox field is empty again (which then pulls the latest release instead)