[data] Add a CSS for undo UI rendering The nesting of ordered list and unordered list was badly handled. This has gone unoticed becaused it was not used. But the undo feature use this markup to render the changesets. That's why this minor change to ths CSS is introduced.

#!/usr/bin/env python
from cubicweb.cwctl import run
import sys
run(sys.argv[1:])