#1 Usable menu bar and event handling.

[Danny (nods)]

The inclusion of a 'menu bar' editor as a glyph block which will define, or
help tb define, its main menu when the program is running in windowed
mode.
This would require that event messages be passed to the running
program via a queue. As there is an existing messaging system in place
already, and the menus can be built, by tb, at runtime based on the
program data it should not be too difficult to implement.