Ideas & Suggestions for 23

Hi Steffen,
I've noticed a problem that I had never before. On upload, I usually select more than just one image. But multi-select seems to be no longer possible in the dialog.

- Safari 10.0.1 :: not working
- Chrome 56 :: not working
- Firefox 46 :: yeah! It seems to trigger a Flash plugin that allows multi-select. I might be wrong on this – but here it works. I dare to update to the latest FF though.

Any thoughts on this issue?
Matthias