[Oberon] Mouse interface

[eas lab]

> That's just me and my fingers. Yours may be different.

Yes, the HumanComputoerInterface is very important.
The apparent triviality of <CapsLock> continually fooling me
on a laptop, is a pain.

OTOH I don't even notice the wheel when I do interclicks.
But would it be difficult to replace the MidMouse with an
<unused> key, even user selectable, depending on the keybrd
or users preference?