Dark Mode

[thejohnha]

Would you consider accepting a pull request to enable a default dark mode? Which changes:

1. Browser theme
2. xterm theme
3. fluxbox background color

Add environment variable DARK_MODE=true which:

a) adds gnome-themes-extra to to debian
b) uses GTK_THEME=Adwaita:dark
c) uses /usr/share/fluxbox/styles/BlueNight
d) changes fluxbox background color to #333333

[MRColorR]

Hello, thanks for reaching out.

Sure, this is a good idea. It would be a good option to have all these changes take place using the variable as a switch.

Feel free to propose a PR; I'll review it as soon as possible