As Michael wrote above, he will add a trackpad gestures support to the next MoI beta.
Then I'll add pinch/zoom, two-finger scroll, double tap gestures to Nodeeditor.
Yes, it's HiDPI mode issue.
Yesterday I also noticed this bug when I run MoI v4+Win7 on my Mac using a virtualization software. So I can reproduce it.
In the same time it works good on Win10.
>> However double finger, double tap does not "zoom to extents" as expected.
>> Rather it zooms to mid-size, but does not centre on the canvas.
I'll change the double-tap zoom logic in the next release.
Fixed a couple of bugs.
Also I clean all waste from NE files.
Updated translation file.
Pilou, I removed french translations of all obsolete and unofficial nodes. Later I will help you to make an extension for unofficial nodes.
Right now I need your help with translation. Could you check an attached file, and add translations for all words marked with "?"