Fall back to non-translated strings in _doing_it_wrong() if the translation function doesn't exist. This may be the case in sunrise, for example.

props SergeyBiryukov.
fixes #23555.
for trunk.



git-svn-id: https://core.svn.wordpress.org/trunk@24439 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Don't render the screen reader shortcut 'Log Out' link in the toolbar when the user is not logged in.

props SergeyBiryukov.
fixes #23178.



git-svn-id: https://core.svn.wordpress.org/trunk@24442 1a063a9b-81f0-0310-95a4-ce76da25c4cd