dconf-editor: Don't use stock image
dconf-editor: Don't use stock image

Stock images are deprecated. Dconf-editor uses the GtkImage:stock
property in the close button in the search box. Replace it with the
GtkImage:icon-name property instead.

https://bugzilla.gnome.org/show_bug.cgi?id=739422

GNOME/dconf,GNOME/dconf,GNOME/dconf,GNOME/dconf