LDEV-1248: Answers hidden in monitor were still showing in learner. Updated the export portfolio jsp so that it indicates hidden in the class view, and hides other students' answers that are marked as hidden in the learner view. In the same way, the two learner summary screens now only show a "hidden" response if it is the learner's own response.
fixed learner icon bug where icon would hide behind activities if moving from an optional activity - fixed depth issue by creating a container for the learnerIcon(s)
LDEV-1235The polling interval was set to 10 seconds. When the screen is first loaded it must wait the full 10 seconds before it receives the user presence information.Polling interval reduced to 6 seconds to reduce the wait.