Fix jcrop on edit user profile

-- Make sure we hold on to the jcrop_api handle
-- Call destroy after crop and cancel rather than setImage
-- Remove inline styles from master image after calling destroy (see
   https://github.com/tapmodo/Jcrop/issues/46 for details)
-- Fix path for missing image. We don't have a large version of the default image
   so in that case, show the medium version for the fancybox
-- Fix scoping for file input change event
-- Minor formatting change