Add new visibility on project level
Description
Today on Groups you can choose visibility on group as private that means: "The group and its projects can only be viewed by members.". But in this scenario you can set visibility level on project only as private that means: "Project access must be granted explicitly to each user.".
Proposal
Is useful to have another visibility level on project like "group internal" that means that every people that are part of that group can work on that project.