Fix typo in verify_file_md5() description. see [25541].

props siobhan.
see #27651.

git-svn-id: https://develop.svn.wordpress.org/trunk@27938 602fd350-edb4-49c9-b593-d223f7449a82
Clarify tooltips on Edit Image screen.

props siobhan.
fixes #27651.

git-svn-id: https://develop.svn.wordpress.org/trunk@27939 602fd350-edb4-49c9-b593-d223f7449a82