OO-1616: update user course infos via SQL statement, don't retrieve identity with the bookmark in course

OO-1787: remove reference of pages database object in the multi pages controller, reload the page every time

OO-1785: revert order of first name and last name, make not mandatory property visible but not by default

OO-1786	: show the subscription on the list of groups/participants, clearfix the subscription in the individual/group view, wording

OO-1784: scale the width and height of the images which are wider as the A4 page of the word document

OO-1761: more fix to the copy of course element within a course, copy or import of a course with a project broker element

OO-1770, OO-1769: allow pseudonym and guest posts, refactor the message model to hold only threads or messages of a unique thread in memory, minimize the number of joins on query, minimize the number of queries on peekview, remove buggy docking feature...