Support Custom Fields on Feedback Posts
We have just started using Sleekplan, and we've started by putting in feedback we've personally recieved manually. We've already we've noticed we want to keep track of the customer that submits feedback, but there doesn't appear to be a great way to do that. Right now we're adding a private comment on the post, but we can't group feedback by particular clients that way, for example.
We would love to have a way to add a custom field (in this case we'd call it "Client") that we could:
* store the value
* sort by in the posts list
* be able to be private (only visible to those with backend logins)
* enter arbitrary text
* ideally it would recomend already existing values (though not nessesary for an MVP)