goa: Remove old dialog code
goa: Adapt to UI designs better
driver: Make the initial window size bigger
gnome-initial-setup: Start in new user mode

... unless specified otherwise.
timezone: Adapt to new UI design

This isn't 100% complete yet. Still investigating issues with GeoClue,
the pin is in the wrong location on the cc-timezone-map, and we still
have to add the "Search" bubble overlay. Spinner may not be necessary
as we would have found this at startup, I hope...