User mode: black keys and alpha

[ramon_ea1gth]

Good tip! I was focusing on the black keys, so I didn't pay attention to the four keys without predefined alpha mapping (dot, space, enter, and cancel).
My idea would be to launch (with alpha-dot) some kind of custom nested menus/choose boxes, with a second custom key (alpha-enter) to return to the last used menu. Thanks for the code suggestion for inspiration!