jshint shouldn't throw errors - wp-admin/about.js

[kadamwhite]

Now, putting aside the fact that this file will probably be going away.

25870.all.diff contains the same changes @jorbin made, plus a minor optimization to cache the reused jQuery object in a $result. I'd like to take this opportunity to make changes like this if we're editing the same lines for JSHint coverage, but I want to run that by jorbin, nacin et al.

[nacin]

25870.all.diff​ looks good, but in this case, this file will be removed in 3.8 anyway.

[nacin]

In 26065:

Avoid JSHint errors. Use dot notation when able and declare pwsL10n as a global.

props jorbin.
fixes #25870.