Style question status in table with questions, in status progress arrows and in the question edit view

OO-3237: root of document pool tree use the same label as the site, remove hard coded title of the infos page, add warning if no info page configured

OO-3029: enhance "Shared with me" in e-Portfolio with pages list, save informations per reviewer / page...

OO-3112: Option to delete questions of a user when the user is deleted. Delete also marks, security group, files when a question is deleted. Predefined query to find all questions without author

OO-3029: add statistics about the number of pages in status "Draft", "In revision" and "Closed" in the "Shared with me" table