Bugfix: Nested Popup not centering in FF and Chrome

[RVXD]

Hi Aaron,

I noticed the nested popup is not centering properly in Firefox and Chrome.

It seems line 40 of dataobject_manager.js simply misses 'var'

Current:
top = $.fn.DataObjectManager.getPageScroll()[1] + ($.fn.DataObjectManager.getPageHeight() / 10);

Suggestion:
var top = $.fn.DataObjectManager.getPageScroll()[1] + ($.fn.DataObjectManager.getPageHeight() / 10);

Regards,
Remy Vaartjes