Use the WP.org CDN for About page images. fixes #26534.


git-svn-id: https://develop.svn.wordpress.org/trunk@26845 602fd350-edb4-49c9-b593-d223f7449a82
On update, delete files removed in 3.8.

props JPry.
fixes #26535.


git-svn-id: https://develop.svn.wordpress.org/trunk@26846 602fd350-edb4-49c9-b593-d223f7449a82
Suppress admin notices on the about page.

Brings back [19393], accidentally reverted in [26718].

props ocean90.
fixes #26519.


git-svn-id: https://develop.svn.wordpress.org/trunk@26847 602fd350-edb4-49c9-b593-d223f7449a82