On some machines used for pre-press or animation the number of display-suitable
profiles is going to be large. We really don't want to have a GtkComboBox
several times bigger than the height of the screen to navigate.
Also, while we're here get some design feedback from the #gnome-design guys and
fix up some spacing and alignment issues.
Remove the 'Only profiles that are compatible with...' lightbulb helper and
instead just set the dialog title to include the device class, e.g.
'Available Profiles for Printers'.
Resolves https://bugzilla.gnome.org/show_bug.cgi?id=661657
Adwaita now themes these, and a single random row of centered pixels just looks wrong.
Use an empty GtkLabel to introduce padding without the random pixels.
This is designed so power users can create virtual devices (just like in
ColorSync) that represent things like 'Hexachrome Press #2' or 'Cinema'.
This new UI isn't actually wired up yet, and there are no new UI controls as
the UI still needs love from the designers.
This was added at this point for two reasons:
1. To get the translations early so we can enable this later
2. To be able to delete the code out of gcm-prefs.c
