Sorting after the image scale for each image causes the list to change
as you're viewing it depending on the size of the image.
This can be quite jarring visually.
https://bugzilla.gnome.org/show_bug.cgi?id=691800
The file is in $incdir/gsettings-desktop-schemas/gdesktop-enums.h,
and pkg-config returns -I$incdir/gsettings-desktop-schemas, so the
right way is to #include <gdesktop-enums.h> which is what other modules
do.
https://bugzilla.gnome.org/show_bug.cgi?id=642369
Remove unused "backgrounds-liststore" object from .ui file, and
add remove button.
Make remove button sensitive for files that were copied to the cache,
and implement remove itself.
Remember needs_download when copying CcBackgroundItem objects.
Make "Add" button unsensitive in chooser when background was
already added to the list, to avoid duplicates.
Ellipsise background label.
Now we'd just need gnome-bg to make the jump.
This also fixes unique IDs for the wallpapers source, as
multiple backgrounds can be defined in a single XML file.
It now is a full GObject, will be able to track the original
XML file for a wallpaper, as well as which values are set in it.
This will allow us to restore wallpapers properly, and only offer
editing options when those aren't already hard-coded inside the
item.
