The icon is huge on mac osx

[sisyphsu]

I build and run the example, found the icon is very huge on OSX.

It looks like this screenshot:

[jslegendre]

This is because macOS does not automatically resize images for the menu bar. I have found 20x20 px to fit well in most cases.

[jslegendre]

I think this does raise a good question however.
@zserge Should images be automatically resized for the macOS menubar?