Add window height method

[Nidoxs]

I noticed there was no way to increase the max height constant for the Cmdr command window. It's a negligible feature, but it'd be useful for developers who need a little more screen real estate for verbose return strings.

Didn't spend too long on this fork, so if there's any mistakes please let me know.

[Nidoxs]

Also, my StyLua checker may have messed up the formatting of your code. If needed I can restart this with StyLua disabled. 👍

[evaera]

Please revert the format changes and we can merge

[Nidoxs]

Easier to create a new PR for this than undo StyLua changes.