Add a new binding signal ::backspace, bind it to the backspace key, and

Add a new binding signal ::backspace, bind it to the backspace key, and

Mon Aug  2 01:30:03 2004  Matthias Clasen  <maclas@gmx.de>

	* gtk/gtktextview.[hc]:
	* gtk/gtkentry.[hc]: Add a new binding signal ::backspace,
	bind it to the backspace key, and make it pay attention
	to the Pango backspace_deletes_character
	attribute.  (#119891, Noah Levitt, patch by Theppitak
	Karoonboonyanan)