Add an option to prevent self deletion (hhucn/adhocracy.hhu_theme#226)
Enterprising users often click on everything that looks even remotely clickable. Since deletion is a prominent button at the moment and not really needed in closed instances, add a configuration option adhocracy.allow_self_deletion (defaults to true) that can be toggled to prevent users from deleting themselves.
[prevent-self-deletion] Simplify delete permission check
Merge pull request #337 from phihag/prevent-self-deletion

Add an option to prevent self deletion (hhucn/adhocracy.hhu_theme#226)