Convert GailExpander to GtkExpanderAccessible
At the same time, drop the AtkText implementation. Also, reintroduce a GtkBoxAccessible, since the previous way of setting the role in get_accessible was affecting GtkBox subclasses negatively. Adjust expected test output to match.
gtk/a11y/gtkboxaccessible.c
0 → 100644
gtk/a11y/gtkboxaccessible.h
0 → 100644