Fix for #84668, reported by Torbjörn Andersson:

Fix for #84668, reported by Torbjörn Andersson:

2003-06-05  Matthias Clasen  <maclas@gmx.de>

	* gtk/gtktextview.c: Fix for #84668, reported by Torbjörn Andersson:
	(gtk_text_view_grab_notify):
	(gtk_text_view_state_changed): Implement these
	to unobscure cursor when grab shadowed or insensitised.
	(gtk_text_view_unobscure_mouse_cursor): New function to undo the
	effect of gtk_text_view_obscure_mouse_cursor(). Code lifted from
	gtk_text_view_motion_event().
	(gtk_text_view_motion_event): Use gtk_text_view_obscure_mouse_cursor().