Derive from GtkDialog, and use stock buttons. Should be 100% source

Derive from GtkDialog, and use stock buttons. Should be 100% source

2000-11-02  Havoc Pennington  <hp@redhat.com>

	* gtk/gtkfilesel.h, gtk/gtkfilesel.c: Derive from GtkDialog, and
	use stock buttons. Should be 100% source compatible, appropriate
	filesel fields now point to dialog->vbox and dialog->action_area.
	On the bizarre side, dialog->action_area and filesel->action_area
	are not the same widget.
	(gtk_file_selection_init): Put some padding around the selection
	entry, so it isn't touching the GtkDialog separator.

	* gtk/gtkfontsel.h, gtk/gtkfontsel.c: Derive from GtkDialog,
	use stock buttons, etc. Should also be source compatible.
	Set the dialog default title in _init not _new().

	* gtk/gtkcolorseldialog.c (gtk_color_selection_dialog_init):
	Use stock buttons; don't put a button box inside the existing
	dialog button box. Don't bother with push/pop colormap anymore.

	* gtk/gtkdialog.h (GtkResponseType): Add a bunch of more
	specific GTK_RESPONSE_* values. This is clearer than ACCEPT/REJECT
	for message dialog, and necessary for the font selection and color
	selection with help and apply buttons.

	* gtk/gtkdialog.c (gtk_dialog_add_button): Return a pointer
	to the created button widget. Set GTK_CAN_DEFAULT on the button.
	(gtk_dialog_init): Default to GTK_BUTTONBOX_END, put less spacing
	between buttons, put less padding around the action area.
	(gtk_dialog_run): Exit on unmap rather than on destroy.
	This will also exit the loop if the widget is hidden.
	(gtk_dialog_delete_event_handler): Use GTK_RESPONSE_DELETE_EVENT
	instead of GTK_RESPONSE_NONE; since we're already adding a bunch
	of GTK_RESPONSE_* stuff, this seems cleaner, and lets you
	special-case delete event.

	* gtk/gtktexttagtable.c, gtk/gtktextview.c: Fix doc comment
	formatting