Menu usage: enabled arrow-key based browsing, especially for open and close sublevels. Only thing missing is to prevent sublevel to open on creating menu (like SHIFT+A now), this is design conflict in code. (It sends fake mouse move events causing it) Implementation note; the 'auto open sublevel' feature gets triggered with new state var, that checks if mouse was used or not. Also: on render in editmode, editmode result gets stored, as usual for 2.4x.