Adds String >> charCodeAt:
Use a single char string instead of the char code as key of commands
Fixed Environment >> moveMethod:toClass:
Fixes Environment >> removeMethod:
Fixed Helios workspace
Helios: Fixes method selection when a method is moved
Helios: Improved lists to make sure that the selected item is always visible
Helios: Improved command registration in menus
Helios: Removed HLCommand class >> isValidFor: