Reload roster on affiliation change
phenomenon
Occupants JIDs will not be displayed when affiliation of an occupant user changes from !Participant/Visitor to !Administrator/Moderator, and opposite, until user leaves and then joins again to MUC.
implementation recommendation
Reload roster when user affiliation changes in the following cases.
||Administrator||↔||Participant
||Administrator||↔||Visitor
||Moderator||↔||Participant
||Moderator||↔||Visitor