Created attachment 357115 [details] [review]
display: Refactor night light widget instantiation

We'll need multiple instances of this widget in the new panel
design. This makes it possible.

Created attachment 357116 [details] [review]
display: Add some signals to the new configuration API

These will be useful to keep track of changes across different places
in the new UI.

Created attachment 357117 [details] [review]
display-config-dbus: Consider interlaced flag for similar modes

Otherwise we could end up picking an interlaced mode when we want a
non-interlaced one or vice-versa since they might have equal
refresh rates.

Created attachment 357118 [details] [review]
shell: Add GtkListBox/Row derived types that do single row activations

We often use rows representing different things in the same list
box. In these cases it's often desirable to have rows emitting their
own activation signals instead of having a single handler for the
whole list box that dispatches according to the activated row.

Created attachment 357119 [details] [review]
display: Re-design the panel

This implements most of the new Display panel re-design by Allan
Day.

Left out for now is brightness setting which still is in the
Power panel because the plumbing layers don't yet associate backlights
with outputs.

Also left out is the presentation mode and trimming of options due to
hardware constraints since we don't have a mutter implementation for
those yet.

Pushing this for now. We'll iterate further in separate bugs.

Attachment 357115 [details] pushed as 9b0cf33 - display: Refactor night light widget instantiation
Attachment 357116 [details] pushed as 7c89e30 - display: Add some signals to the new configuration API
Attachment 357117 [details] pushed as 353236b - display-config-dbus: Consider interlaced flag for similar modes
Attachment 357118 [details] pushed as ddd2d5c - shell: Add GtkListBox/Row derived types that do single row activations
Attachment 357119 [details] pushed as c0f686b - display: Re-design the panel