Allow List of Users filtering also by entering first and last name, not just the user id

Having a Livetable with List of Users that are displayed nice is really great.
The problem is that when you want to do the filtering you might want as a user to be able to filter both by writing parts of the first_name, last_name or by writing the user id.

For example, in the livetable found on design.xwiki.org I would like to be able to look for:

• (first name) Ecaterina | cat | ...
• (last name) valica | moraru | ...
• (user id) evalica

In the current implementation only the user id is valid and as a developer is easy for me to remember the ids because we use them in git, etc. but normal users will know and remember better the first/last name.