Since we're dealing with a huge password meter, don't bold half of the result strings unnecessarily. see #25603.

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About page: Prevent the meter from briefly sticking on 'Strong' when the animation resets.

props jorbin.
see #25603.

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git-svn-id: http://core.svn.wordpress.org/trunk@25760 1a063a9b-81f0-0310-95a4-ce76da25c4cd