OO-681: enhance the XSL stylesheet which outputs the results to handle interval of values as correct answer

OO-532: fix the callout which stay on the top left of the window after switching the view from month to week and so on

OO-533 various layout improvements question pool, streamlined highlight color in table, calendar and buttons

OO-623,OPENOLAT-128: prevent batch merge, configure, remove... in the groups lists if an item is managed, show a warning if it's the case, add some warnings too if there isn't no selected group for a batch operation

OO-623,OPENOLAT-123: only show the booking infos / warning if the course or the group is not managed, or it's managed but has already a booking configured

OO-658: fix an CSS issue where the open/close link is hidden by the select link, enable to close menu item in the admin tab

OO-671: remove the AssertException, a red screen is not the right response for the users if the adobe connect server is not available, or the configuration is wrong

OO-670: preselect participant if there is only 1 group or 1 repository entry, add a warning if the user miss to select a role

OO-662: optimize the method which retrieve the memberships of a repository entry the same way as for groups to prevent the cross product in the view