When viewing permissions for a user on a specific node, provide information about which security domain(s) provided the privilege

Since we did a complete remodel of the security configuration setup, which also requires significant upgrade work and also developers need to get acquainted with the new model, we need to help them out as much as possible.

CMS-12122 helps enormously already since with that feature, you can select a user and see what actions and privileges the user has on a specific node. This is really helpful for developers, and potentially in production for an admin to do some sanity checks on user permissions.

However what is still missing, is that there is no explanation where that privilege is coming from. A permission, for example jcr:read on a specific node can actually be the result of multiple domains! If we can support information about this to the developers / end users it will help a lot improving the security configuration for an end project