Improve lists in user guide for selections

Improve lists in user guide for selections

- Support enumerated list formatting in console output to make it
  possible to use reStructuredText enumerated lists in help texts.
- Make the keyword list use a bullet list for the keyword groups,
  providing some visual structure for the HTML output.  The extra stars
  do not hurt in the console output, either, but changed the extra help
  indicator to be a + instead of * to reduce confusion with these other
  stars.

Change-Id: I4d5063d4f117a31ea31d8d78cd799dfbd0f1eac8