[Enhancement] Add CVAR to change WINDOW TITLE

[xplshn]

The flatpak for OpenARENA which I maintain uses Quake3e, the title is always set incorrectly and con_title did not help: flathub/io.github.ec_.Quake3e.OpenArena#115 (comment)

[KG7x]

con_title already exist

[ensiform]

Did you add it like +set con_title "Blah blah here" to launch parameters?

Apparently this is only useful for windows dedicated server console window/viewlog.

[KG7x]

ah cl_title i think can help