Make sure direct chat invites are treated as invites
Make sure direct chat invites are treated as invites

Fixes https://github.com/vector-im/riot-web/issues/8966

The DMRoomMap updates before we accept the invite, so make sure to check if it is an invite before checking if it is a direct chat.
matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk