Make automatic terminal title optional

[savchenko]

Is your feature request related to a problem? Please describe.
Terminal title is force-set and not cleared on exit.

Describe the solution you'd like
Just make it optional.

Describe alternatives you've considered
None, there is only one true way in this case - make it optional :-)

Additional context
Happy to work on this feature. #2832

Ref. #2484 (comment)

[acuteenvy]

not cleared on exit

The shell usually sets the title to something else after gitui exits.

None, there is only one true way in this case - make it optional :-)

We could also just save the previous terminal title and reset it on exit.

[savchenko]

We could also just save the previous terminal title and reset it on exit.

That won't do unfortunately. I set the title myself via the wrapper script as I need to see a specific information in there, hence the PR.

I think that in general, it's a good practise to offer a user "sane default behaviour with a way out".