Feature: dark mode

**Is your feature request related to a problem? Please describe.**
My eyes, I go blind at night when I see the screen, this window is very bright.

**Describe the solution you'd like**
They could place a selection of themes to change the colors to suit one.

**Describe alternatives you've considered**
use the colors used by gtk / kde apps and use those colors / themes

**Additional context**
try to change the dependency of the use of npm for yarn, I use yarn instead of npm but well it is not so important but I must mention it since npm is not the only one.