Attempt to animate the canonicalization process.

[huttarl]

I wanted to see the canonicalization process in action. So I added a little bit of code into canonicalize(), to call

        // Update the polyhedron vertices to show progress
        poly.vertices = newVs;
        // update the display to show animated progress
        drawShape();
        // Yield to UI thread to allow display update
        await new Promise(resolve => setTimeout(resolve, 0));

at the end of each iteration. (The await meant that canonicalize() had to be made async.)

But I can't test it. When I rebuild (build.sh does a concatenate and minify) and reload the page, I get this error:
SyntaxError: '[test!='']:sizzle' is not a valid selector. I've read that this has something to do with either not waiting for the page to fully load, or minify working incorrectly. I have minify 2.24.3 installed by homebrew. No idea what sort of minify was used before. When I try to modify polyhedronisme.min.js by hand, I get baffling errors ... no idea what's going on.

So I offer this little change, hoping someone (e.g. @levskaya) can try it, rebuild the app, and deploy the change ... or else tell me how to fix my build process.

The await new Promise(resolve => setTimeout(resolve, 0)) is an attempt to not block the UI thread for too long and allow canvas writes to be displayed. But I don't know if it's actually helpful, or breaks things. Without it, canonicalize() doesn't need to be async, which may make the change simpler.