Introduce virtual function GimpViewable::is_name_editable() and class
member "gboolean name_editable" for the default value. Default to
FALSE and only return TRUE if the name can actually be edited by the
user.
When attemting an edit, check the new API and beep instead of starting
the edit.
and remove lots of labels from calls to gimp_prop_foo_new(). Also
had to manually remove some unwanted labels that are now added
automatically, fixes bug #761880.
- don't include <gdk-pixbuf/gdk-pixbuf.h> in headers in app/
- instead, include it in many .c files instead of <glib-object.h>,
finally acknowledging the fact that app/ depends on gdk-pixbuf almost
globally
- fix up includes as if libgimpbase depended in GIO, which it soon will
