port fc1f74fd09d76a9c0bc50b148a7da15468a8653b from Pd-l2ork:  *fixed bug in midifile where its helpfile was inappropriately named, thus failing to open appropriate help file.

That whole function is a nasty mess that needs to be refactored

The fact that nwjs menubar shortcuts don't propagate to the DOM makes this tricky
The fact that OSX has its own OSX-app menu bar thingy makes it even trickier

normalize Windows path before sending it to Pd

bind/unbind scalar symbol in scalar_vis instead of scalar_new
This way scalar events continue to work if the user happens to
change the [struct] arguments on us.

make [draw] arguments more closely follow the svg spec
* [draw circle 20 1 2]: radius=20, xcenter=1, ycenter=2
* [draw rect 5 10 20 40]: width=5, height=10, xoffset=20, yoffset=40
* [draw ellipse 5 10 20 40]: xradius=5, yradius=10, xcenter=20, ycenter=40