OO-952: move the "display members" configuration to the business group table, optimize the query for the roster (list of contacts)

OO-934: the efficiency statement event must redraw only the link to open the efficiency statement and not the whole page

OO-951: create a wrapper for the properties to update, it prevents the auto flush of the changes on the database

OO-948: make the ContextEntryControllerCreator cloneable, a cloned creator can save request dependent informations between the calls of the different method to prevent multiple loading of the same resource, calculate severals time the permissions...

OO-948: commit the updated repository entry first to free the lock and play with the lifecycle after