Rights for Global Properties

Currently there is just the option to grant rights to ALL global properties, but not to selected once. This does cause issues as I cannot allow users or events (which are authorized by a user) to only access selected properties.

It would be great if e.g. global properties are assigned to schedules or departmenst and through this way right to access/manipulate global properties (well they would possible than be called department properties) would be assigne dmore selective.