Enable XWayland

so applications requiring X11 can start.  See e.g.
Librem5/Apps_Issues#42 is fixed.

Don't remove it form the config so it's easy for people to test without
XWayland.

data/rootston.ini

-[core]
-xwayland=false
+#[core]
+#xwayland=false
 
 [cursor:seat0]
 map-to-output:HDMI-A-1