export dbus-launch to fix windowing system

Author: johrstrom

template/script.sh.erb

@@ -14,6 +14,8 @@ cd "${HOME}"
   export XDG_CONFIG_HOME="<%= session.staged_root.join("config") %>"
   export XDG_DATA_HOME="<%= session.staged_root.join("share") %>"
   export XDG_CACHE_HOME="$(mktemp -d)"
+  export $(dbus-launch)
+
   module restore
   set -x
   xfwm4 --compositor=off --daemon --sm-client-disable