Add ability to edit collaborators, name, description of a running voting round

[efstajas]

Currently, none of those things can be changed after the voting round has been started.

Editing the name & description should always be possible, even after voting is over (before publishing), and the new name & description will be taken over by the final Drip List upon publishing.

Regarding collaborators, WHILE THE LIST IS IN VOTING, it should be possible to:

• Add new collaborators
• Remove collaborators, even if they've already voted

If a collaborator is removed after they've voted already, their vote should be discarded.

I was thinking about whether we should only allow removing collaborators that haven't voted yet, but it makes little sense considering the publisher is free to alter the Drip List at any point after publishing anyway. It'd be really annoying if an entire voting round would have to be restarted just because it was discovered that someone who wasn't meant to be a collaborator voted early on.