-Documentation

-Tree widget

-Text widget (needs to be finished)

-Widget redrawing when the window resizes sometimes messes up.

-Make sure a widget added to a list is a list item and a widget added
 to a menu is a menu item, etc...

-More dialogs? Print, font, etc?

-Multiple document interface (MDI)?

-Support another widget style? Should be possible using GtkStyle's, but
 there may be some work needed to remove any style dependencies in widget
 code. Maybe GtkStyle's should have 'draw_push_button', 'draw_check_button',
 etc, functions to draw the various widgets.

-OffiX drag and drop support

-Fix focus activation of list items. Does list item activation have to be
 completely reorganized?

-Lists should scroll to center the recently selected item if it isn't
 visible.

-Make all widget attributes configurable after the widget is created.
