Invitation is not in the correct group in the Feed

[elenadanailova]

I am participating in this invitation because I offered an hour.
However the invitation is not under "Participating" group.

[nworbnhoj]

This issue relates to #103 : Replace "A Match has been confirmed for this Invitation"

When an Appeal owner confirms a Bid then a Match is created, the Bid is deleted, and the Hour is removed from the Appeal.

`This explains why EDanalova is no longer participating in the Match - and could in fact Bid again on a different Hour (if the Appeal was not expired)

#103 proposes to make the Appeal completely invisible to the winning Bidder.