Widgets don't show properly on macOS

[adamltyson]

Bottom (e.g. run) buttons can't be seen on small screens.

[dstansby]

I dived into magicgui and couldn't obviously find a way to fix this, so I've opened https://github.com/napari/magicgui/issues/380 to ask about being able to resize widgets.

[dstansby]

Fixed by brainglobe/cellfinder-napari#79

[adamltyson]

I'm reopening this as the problem appears to be back.

[dstansby]

Some background on where I left this, which might be helpful:

• My first attempt at adding scroll support didn't work with napari
• I opened a second magicgui PR to fix this (https://github.com/napari/magicgui/pull/429). This PR has been merged, but not put into a release of magicgui, so action here is to nudge Tally to do a release
• I think once that's release there also needs to be a change in napari to use the new root_native_widget property that I added in the above PR. I don't think I got round to that, so action there is to open a PR in napari (once a new magicgui version is released

[adamltyson]

Thanks for the clarification @dstansby.

Naively, I assumed that either using scrollable=True or using the unofficial API (#79) would allow a scrollable widget. I haven't dug into why, but both seem to be required, do you know why?

[adamltyson]

This still needs to be addressed for the curation and training widget.