Should check IsMember before posting #7
Description
If a user is has not been invited as a member of the board, posting a message fails with the error "Unknown". So, before calling CreateThread, etc. we should do a qEval for IsMember . If this returns false then we need to tell the user to get invited by the board administrator.
At some point, boards2/v1 will support an "open board" where the user can post without being invited. We will check for this too.