Touchscreen support broken on GTK4
Hard to tell to me what's exactly broken without debugging the internals, but the problem is obvious enough that I believe "is broken" is actually enough to describe the problem.
gtk4-demo with a touchscreen - for me, on either X11 or Wayland and on multiple devices, touching the list of demos leads to selection of a wrong entry, there's no way to unfold a subtree and when trying to actually launch some demos, it's very easy to get into some broken state where touch events stop functioning at all (this one seems to be easier to trigger on Wayland; on X11 I've seen aborts on
[xcb] Unknown sequence number while processing queue instead). Generally, it's not usable at all, while using mouse works perfectly fine.
master branch, commit 60329c3c.