Switch from GtkBuilder to using GtkTemplate.
Rename widget IDs to be more readable.
Drop widget IDs that are not used.
Move code into the .ui file that can be.
Connect signals in swapped form.
The current widget has a very generic name "EditDialog" - rename it to something
that reflects better what it is for.
Implement it is as a full GtkWidget using GtkTemplate.
Move some of the logic from inside the dialog to the code that creates the dialog
so less data is passed around.
Store properties using functions instead of g_object_set_data - that passes
everything as a gpointer which is easy to make a mistake with.
Place panel switches into GtkListBox and change their
behaviour so that:
When "Notifications" switch is off, all other switches in the dialog are
insensitive.
"Notifications Banners" switch is off and insensitive when corresponding
panel switch is off.
"Show Message Content in Banners" switch is off and insensitive when switch
above is off.
"Lock Screen Notifications" switch is off and insensitive when corresponding
panel switch is off.
"Show Message Content on Lock Screen" switch is off and insensitive when switch
above is off.
https://bugzilla.gnome.org/show_bug.cgi?id=742521
