Saner CSS for row actions - now we can just target `.row-actions` instead of both `.row-actions` and `.row-actions-visible`. CSS for `.row-actions-visible` remains for now due to usage in plugins. Visibility is controlled by toggling a `.visible` class. fixes #25403.


git-svn-id: https://develop.svn.wordpress.org/trunk@25592 602fd350-edb4-49c9-b593-d223f7449a82