A huge improvement, IMHO! Thanks!

About the mockup, I wonder why not indenting the destop options?

Something like:

│ [*] Debian desktop environment
│ ... [*] Xfce desktop environment
│ ... [ ] GNOME desktop environment
│ ... [ ] KDE desktop environment
│ [ ] web server

or

│ [*] Debian desktop environment
│ └─ [*] Xfce desktop environment
│ └─ [ ] GNOME desktop environment
│ └─ [ ] KDE desktop environment
│ [ ] web server