Could you do a mockup screenshot of what you mean, exactly? I don't know what the difference is between this and the "ActionList: Comment" action that already exists.
This was a feature, but has been removed as it caused too many problems when disabled Actions were left in an ActionList. You can remove unwanted Actions by manually moving them out of the Actions folder.
Comments
In v1.49, you'll be able to re-colour all Actions by type within the Actions Manager.