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.
g_settings_delay() doesn't work like GConf's changesets. Either
you create a separate GSettings for non-delayed application,
or you call g_settings_apply() any time you want changes applied.
The gnome_wp_item_update_size() code was working off old data.
We need to copy the height and width as well if we want it to
match the current background. The next call to _update_size()
will fill in ->size if it wasn't already set.
Add icon to represent slideshows, always show a name for the
currently set background on startup, show whether a background
is a slideshow, and its pixel size if available.
The style wasn't set properly on startup, and then incorrectly
applied to the preview because the numbering of the items in
the style-liststore doesn't match the GDesktopBackgroundStyle
enum 1-to-1.
Take a reference on the panel object when the asynchronous copy is started
so that it is still valid in the callback when the panel is being
destroyed.
