xinitrc: start i3 with dbus, I am finally using startx again

rc/xinitrc

@@ -1,3 +1,4 @@
-export XCURSOR_DISCOVER=1
-[[ -f ~/.Xresources ]] && xrdb -merge -I$HOME ~/.Xresources
-exec mate-session
+# Using dbus-launch seems to be necessary here to get dbus up, otherwise
+# there are errors about it missing and pasystray & nm-applet cannot be
+# interacted with.
+exec dbus-launch --exit-with-session i3