Bug#939896: Two-finger touchpad scroll is broken in wxgtk3.0-gtk3 on wayland

[Gunter Königsmann]

Package: libwxgtk3.0-gtk3-0v5
Version: 3.0.4+dfsg-9
Wayland only (X11 works fine): Attempts to do a two-finger scroll using
my synaptic touchpad don't cause applications that use the gtk3 flavour
of wxgtk to scroll. The two-finger scroll seems to be ignored instead.
Ordinary gnome applications seem to work fine, instead. Also wxgtk3.0
applications that use gtk2 seem to work fine.