Rename the app-id to org.gnome.Settings since this is what
we've been calling it for many years now. Adjust all files
that derive from the app-id, such as the desktop file, D-Bus
service file names, search providers, GSettings schemas, to
match that.
Closes https://gitlab.gnome.org/GNOME/gnome-control-center/-/issues/344
As the sidelist gets more complex, managing it in CcWindow
would make it very confusing.
This patch introduces the CcPanelList, a widget that manages
the sidelist.
https://bugzilla.gnome.org/show_bug.cgi?id=767301
In order to prepare ourselves for the future changes,
having the window as a template class is hugely advantageous
for we'll be able to modify the interface much more
quickly and cleanly.
This commit makes the window a template class, and only
that. No behavioral changes, nor new features were
introduced here.
https://bugzilla.gnome.org/show_bug.cgi?id=766922
