Added GtkHeaderBar
Added a screenshot of the current status
Added gtk version check (needs polishing)
Polished check_gtk_version
Playing with listbox in language.py (still nothing to see)
Check gtk version
More changes to  gtkheaderbar
playing with buttons
It looks nice (imho).
Added a pair of screenshots to show progress
GtkListBox does not work yet. Done a little change in the header image.
Playing with Gtk.ListBox
Listbox is shown in language screen. Nothing works yet
Listbox is working (or so it seems) in language screen.
Added check
Removed some unexisting properties from the GtkHeaderBar definitiion in cnchi.ui
Working on adding a GtkListBox to features.ui
Needs polishing but listbox is shown in features
Location also has a listbox
Fixed some GTK warnings