Support application of access control policies to multiple selected components

When applying user access controls and policies, it would be very useful if a snippet (a collection of selected components) could all have the same user policies applied at once. Validation would have to occur to ensure that the proposed policies do not conflict with the existing policies.

For example:

Given:
Secured NiFi
User Matt with normal user permissions
User Andy with admin permissions
Canvas with 4 components, all accessible by both users
I am logged in as Andy

When:
I drag a selection marquee around 3 components and select them and then click the key icon in the palette

Then:
I should be able to modify the components and remove Matt as a user with "modify the component" policy