List number of internal notes on plugin post list

[Ipstenu]

​https://wordpress.org/plugins-wp/wp-admin/edit.php?post_status=draft&post_type=plugin

Right now it lists a bunch of great info for devs, but for admins it would be nice if it showed us how many internal notes there were :)

That way an admin could know if a reviewer had left a note or not, since they don't have the ability to edit post status itself (and leaving an internal note doesn't change 'last edited').

[mordauk]

Being able to sort asc/desc on the notes column would be useful for quickly finding the plugins that have received a review of some kind.

[ChopinBach]

Adds internal notes column to plugins table with asc/dsc sorting.

[ChopinBach]

Accidentally left in a function that doesn't do anything. This inherits the comments column from the parent class and outputs it as "Notes".

[obenland]

In 3232:

Plugin Directory: Bring back comment column for Plugin Reviewers.

Props ChopinBach for initial patch.
Fixes #1715.

[samuelsidler]

Milestone Plugin Directory v3 - M4 deleted