Suggestion: config to change color of selected commits

[OliverJAsh]

Is your feature request related to a problem? Please describe.

1. Copy a commit

In some terminal themes (I'm using base16-chalk.dark.256), the commit will become unreadable:

I had the same problem with selected lines in the files panel, which I was able to fix using:

      selectedLineBgColor:
        - reverse

Describe the solution you'd like
Perhaps we need another option for selected commits, or an option that controls the colour of all selected text (both commits and lines).

Describe alternatives you've considered

Additional context

[OliverJAsh]

(Same problem for selected text when running a search.)