Desktop Setup

1. For desktop selection: include an icon for each desktop (from anri)
2. After user creation (!), write desktop selection to ly config file

• https://github.com/fairyglade/ly
• A file /etc/ly/save with 2 lines. The first line is the username that was created. The second line contains an integer which is an index to the wayland desktops, for now lets do 0 = sway, 1 = wayfire.