WIP: Resolve "Orga-rights & pick-ups"

Closes #225 (closed)

What does this MR do?

Orga and ambassadors are not autoconfirmed anymore for pickup slots. They have to be approved by a store manager.

How confident are you it won't break things if deployed?

Very

Links to related issues

Checklist

• added a test, or explain why one is not needed/possible...
• no unrelated changes
• asked someone for a code review
• joined #foodsharing-beta channel at https://slackin.yunity.org
• added an entry to CHANGELOG.md (description, merge request link, username(s))