Comment management capabilities

[johnbillion]

I thought this had been brought up before but I can't find a relevant ticket mentioning edit_comments or manage_comments.

The capability required to access the Comments screen is edit_posts. If you have a custom post type with its own capabilities (eg. edit_foos instead of edit_posts) then it's not possible to give access to the comments screen (for viewing comments on custom post types) to users with the edit_foos capability but without the edit_posts capability.

Ideally the capabilities relating to comments would be linked to post types, for example edit_post_comments, edit_page_comments and edit_foo_comments along with an edit_comments meta capability, but this might be asking a little too much.

Related: #19286, #18596.

Comment moderation capabilities have been brought into consideration from slightly different point of view from time to time. It would be nice to solve this once and for all...

See: #4802, #6907, #12104 and others possibly.

I suggest keeping moderate_comments for accept/reject. Then add manage_comments (spam/trash/restore) and edit_comments for anything else. No special capabilities for each post type they relate to.

Reasons: Keep it simple. Comments are a special content type in it's own, and are only related to public post objects.

Closing as dup of #12104