Customizer: Revert [26548], removing _.isEqual() for proper object comparison.

This broke the customizer in IE 11, with possibly other side effects. Revisit in 3.9.

Also reverts [26632].

see #26061 (reopens), fixes #26438.


git-svn-id: https://develop.svn.wordpress.org/trunk@26702 602fd350-edb4-49c9-b593-d223f7449a82
Widgets: jshint cleanup of widgets.js, see #25821.

git-svn-id: https://develop.svn.wordpress.org/trunk@26703 602fd350-edb4-49c9-b593-d223f7449a82