Restrict user access to logbook

Hi,

It is currently possible (though not supported through the UI) to give a user access to only specific entities. However, they still have full access to the logbook and there doesn’t even seem to be a way to let only certain users access the logbook.

I think that it could potentially be quite complex to only show a user logbook events that pertain to entities that the user has access to, so I would propose that a feature is added that simply allows you to specify which users can see the logbook and which ones cannot.

Oh and looks like access to history cannot be restricted either, so ditto for that