Improve focusin detection support

This change prevents unintentional scrolling and unfocusing of
whatever element was in focus before the feature detect in browsers
that need to do the long feature detect.

Adds test case.

Refs #17599
improve i18n preload to take advantage of partially flattened locales, fixes #17155
Position test element so it is actually fixed to viewport

Fixes #17626
 Squashed commit of the following:

commit 3c9c52c95fdf1fcbb796f3d972a28d0a421b8fb2
Author: dylans <dylan@dojotoolkit.org>
Date:   Tue Dec 31 15:23:04 2013 -0700

    refs #17651, make router.destroy fail safely if router.startup has not been called
refs #15130. Fixes copyrights date for 2014.