NSEvent types ... was Re: ScrollWheel, Xdps and NSEvent modification

[Richard Frith-Macdonald]

While looking at the latest Apple MacOS-X NSEvent.h header, I notice 
that they have
now added support for the middle mouse button.

Unfortunately, they decided not to copy our code, and have named theirs 
'Other'
rather than 'Middle'

Similarly, they have added corresponding mouse events, but haven't used 
our naming :-(

I've gone through the gui and backend code and changed all our naming to 
conform
to the new MacOS-X naming.

Sometimes it's more irritating not playing catchup.
If you have apps which use the middle mouse button, you will need to 
update them I'm afraid.