Set terminal title

[savchenko]

Is your feature request related to a problem? Please describe.
Terminal title is not changed which makes it harder to quickly spot one where gitui is running.

Describe the solution you'd like

printf '\033]2;%s\007' gitui; gitui

Bonus points if it's updated with the current pane title (status, log, config...)

Describe alternatives you've considered
Bash wrapper script.

Additional context

before:

after: