add bailey for challenges
[#1711] limit number of members that get sent down with group, limit profile
fields sent down
[#1710] some simplification on Groups memoization. No need for all that
special handling of Header Party, just have it's own controller and do
specific-handling. Also, removing MenuCtrl & StatsCtrl - they weren't
used TMK, I think twas a vestige of mobile. @paglias give that a gander
[#1710] fix to party-in-header