Hi Larry, your Extras.htm and Extras.js are working ok on Windows but not on Mac.
I'll dig into it to see what's going wrong over there.

re:
> Those changes appeared to be applicable to my problem so I applied the same
> changes to my Extras.js and the result is strange in that the Extras icon no longer
> shows in the command bar area to the right of the snaps, but is instead showing
> up in the browser area beneath the objects, types, styles panels.

The strange result is how Psygorn wants the UI to be set up, that's what his modified
version does.

- Michael