Alternative highlighting mode

[Dooez]

Default selected line uses inverted colors for highlighting.
I suggest to add an option to use alternative background color and normal text color.

I provide an example of what i mean from Telescope.

#85 Suggestion possibly achieves this, but I am not sure without an example.

[SmiteshP]

I actually added lot of efforts to copy the inverted colors thing from the ranger file manager, I think its looks retro and cool 😆
But yeah, If someone opens a PR with this changes in backwards compatible way I am okay with it 👍🏽