Update expected results in wp_link_pages() unit tests after [30030].

see #24940.

git-svn-id: https://develop.svn.wordpress.org/trunk@30035 602fd350-edb4-49c9-b593-d223f7449a82
Don't add 'sticky' class in get_post_class() if 'ignore_sticky_posts' query var is set.

props jakub.tyrcha, johneckman.
fixes #18035.

git-svn-id: https://develop.svn.wordpress.org/trunk@30036 602fd350-edb4-49c9-b593-d223f7449a82
Make sure the validator list on Credits screen floats correctly with longer names.

props kosvrouvas.
fixes #30066.

git-svn-id: https://develop.svn.wordpress.org/trunk@30037 602fd350-edb4-49c9-b593-d223f7449a82