I upgraded my laptop (Dell XPS 13) to Fedora 26. Unfortunately, I lost the three-finger click on the touchpad to get an emulated middle button in the process. I use XFCE. I cannot find any relevant configuration in the Mouse and Touchpad settings, nor with xinput, or the settings editor.
My questions: is this a bug, and if so, in what component?
I'm happy to file a bug report, but it helps to know the answers to the above.