Before we have only owner_id to determine group owner
With multiple owners per group we should get rid of owner_id in group.
So from now @group.owner will always be nil but
@group.owners return an actual array of users who can admin this group

-calling build_user will now apply defaults and only override them if as: :admin is set

Change-Id: Id1d938c0967752ecc14370af54f2d88128d18c44

Show permissions for all project.
Add ability to remove user from group if not an owner
Remove unnecessary admin controller

Provide UI with explanation what happens when you block or remove user
When remove user - remove all groups where user is an only owner

Remove unnecessary projects order on User#show

“Can create groups” and “Can create teams” had hardcoded defaults to
`true`. Sometimes it is desirable to prohibit these for newly created
users by default.