Impossible to configure color of title of current active block

[cgahr]

Describe the bug
It is not possible to configure the color of the title of the currently active block directly. That's the orange part on the following screenshot:

As far as I can tell, gitui use color4 of the terminal instead.

Expected behavior
There should the option to configure this style element directly using the config.

Context (please complete the following information):

• OS/Distro + Version: Ubuntu 22.05 LTS
• GitUI Version 0.24.3
• Rust version: no installed

Additional context
Add any other context about the problem here.

[extrawurst]

This is not a feature yet, not a bug

[cgahr]

Any pointer, which part of the code I have to touch if I want to implement this myself?

[extrawurst]

@cgahr by looking into how it would be done I saw its just this simple change, so I did it. please feel free to review it and pick up another good-first-issue

[cgahr]

Thank you so much, I'm happy it was a very small change.

I think, however, that you might have introduced a bug while implementing this, see #2056.