hide invite components for drafts
hide invite components for drafts

Participants/moderators can not see draft projects, so it does not make
sense to invite them.

Ultimately we would like to queue the invitation mails and send them
once the project has been published. Until then, this change slightly
improves the sitation.

liqd/a4-meinberlin,liqd/a4-meinberlin,liqd/a4-meinberlin,liqd/a4-meinberlin