Improve contrast for selected branch in branch popup for light themes

[star-szr]

Describe the bug
The contrast for the branch name for the selected branch could be improved for light themes (see screenshots below).

To Reproduce
Steps to reproduce the behavior:

1. Open the branch modal
2. Look at the selected branch

Expected behavior
I expected this to have better contrast

Screenshots

Context (please complete the following information):

• OS/Distro + Version: Pop!_OS 21.04 (Ubuntu-like)
• GitUI Version 0.17.1
• Rust version: 1.55.0

Additional context
The contrast is even worse (invisible, black-on-black) with my own terminal/gitui theme.

[extrawurst]

Did you try to change that color using a local custom gitui theme?

[star-szr]

Hi! I don't think it can be changed through the gitui theme, I believe it's just the default terminal foreground color being used here.

I just posted the PR: #923

[extrawurst]

@cottser thanks! can you post a comparison screenshot with your change?

[star-szr]

@extrawurst definitely, I forgot to post those. Do you want those in here, in the PR, or both?

[extrawurst]

@extrawurst definitely, I forgot to post those. Do you want those in here, in the PR, or both?

here is fine

[star-szr]

Dark theme, before and after:

Light theme, before and after:

[star-szr]

Looks like this may actually improve contrast in some dark themes as well.

[star-szr]

Solarized dark, before/after:

Thanks @extrawurst!