WYSIWYG field: Improved JS error handling for tinymce and the WP 3.5 media popup

Signed-off-by: Elliot Condon <e@elliotcondon.com>
Image / File fields: Improved edit popup efficiency and fixed bug when upload tab is shown

Signed-off-by: Elliot Condon <e@elliotcondon.com>
JS: Added a render timeout to fix issues with WP 3.5 media popup rendering multiple times causing issues with WYSIWYG field

Signed-off-by: Elliot Condon <e@elliotcondon.com>
Compiled input.js

Signed-off-by: Elliot Condon <e@elliotcondon.com>