[packagekit] themed icons

[Matthias Clasen]

.
>
> I also noticed that pk-update-viewer.c does
>
>         /* add application specific icons to search path */
>         gtk_icon_theme_append_search_path (gtk_icon_theme_get_default (),
>                                            PK_DATA G_DIR_SEPARATOR_S "icons");
>
>
> Which won't really help anymore, now that icons come from the proper
> theme.

Actually, I was slightly wrong on this one. The existing code works
fine for theme changes, but it will not work if you move the window
between different screens, since GtkIconTheme is per-screen. This is
probably fine to ignore for now...