Fixing popup menus to have "Paste" sensitized correctly. Original patches

Fixing popup menus to have "Paste" sensitized correctly. Original patches

Mon Oct 22 16:25:12 2001  Owen Taylor  <otaylor@redhat.com>

	Fixing popup menus to have "Paste" sensitized correctly. Original
	patches from Damian Ivereigh, much mangled.

	* gtk/gtkselection.c: Add functions gtk_selection_data_get_targets(),
	gtk_selection_data_targets_include_text(). (#60854)

	* gtk/gtkclipboard.c: Add a simple do-it-all non-async "check if
	the clipboard has text" function gtk_clipboard_wait_is_text_available.
	(#60854)

	* gtk/gtkentry.c: Only enable the paste item if the clipboard
	contains text. (#60973)

	* gtk/gtktextview.c: Only enable the paste item if the clipboard
	contains text. (#60975)