UPDATE: This appears to be an issue with Unity, as GNOME works.
I recently made the following changes which fix the palm detection for the touchpad on my Dell XPS 13. But, when I did so, it now prevents tap-clicking on menu items in applications (the window manager). I can tap-click on anything else though, and press-click works on the window manager menus though. If I remove my changes, tap-clicking works again on the window manager.
Anyone have experience with this?
Here are the changes I've performed. Running Ubuntu 16.04.
Create /usr/share/X11/xorg.conf.d/90-libinput.conf containing:
Identifier "libinput touchpad catchall"
Option "Tapping" "True"
Option "PalmDetection" "True"
Option "TappingDragLock" "True"