Case sensitive select exit menu tree

[synfinatic]

Viper for some dumb reason converts all the keys to lower case (in violation of the YAML standard) and there is a PR to fix that, but it's been over a year and it hasn't been merged: spf13/viper#635

Maybe someday, Viper will support case-sensitive? Or maybe I can use this fork: spf13/viper#635 (comment)

or maybe switch to something else like https://github.com/knadh/koanf ?

Dunno other than it's kinda lame as is.

[synfinatic]

Fixed.