Change selected background color like lazygit

**Is your feature request related to a problem? Please describe.**
Is there any options to change the selected background color? The default color looks bad in my terminal.

**Describe the solution you'd like**
Have a option like `lazygit`:
```yml
gui:
theme:
selectedLineBgColor:
- default
```

**Describe alternatives you've considered**
A clear and concise description of any alternative solutions or features you've considered.

**Additional context**