DOC: update "11.8.1 Lexique " section

Remove the popup form.

(from redmine: issue id 1423, created on 2015/07/09 by Matthieu Decorde)

added type::doc type::task + 1 deleted label

changed milestone to %TXM 0.8.4

removed type::task label

added status::rejected label

removed status::rejected label

closed

added tool::lexicon label