OO-2830 fix several bugs in members display code, bring back configurable user properties context, also for avatar view
OO-2823: disable fast preview, optimize Chunk and Grow option for our typically number of formulas, disable the menu
OO-2821: fix the hasMasterContainer method to return true/false and not an exception if the container doesn't exist
OO-2723: store the webfeed in the database instead of xml files to enhance the reliability of blogs and podcasts
