Rework key and maybe menu defs to use Save instead of SmartSave

[Andreas Schnellbacher]

A Save key or menu command should execute a Save (as expected), not a
SmartSave. SmartSave would only save a file if it was changed. The
original Save always saves a file.

This was suggested by John Small.

I don't like the idea to support the SMARTSAVE constant any further,
because the key def file is already much too complicated. It provides
much more options then the original. The additional complexity affords
that we should really try to reduce the number of constants to zero.

BTW: SMARTSAVE only applies on the key def, not on the menu items.
Of course, they should be synchronous.

[Andreas Schnellbacher]

Fixed by changeset r2553.