Fixed GetImmediateRootElement when called on a Section. Previously it always returned null.
Fixed GetImmediateRootElement when called on a Section. Previously it always returned null.

This caused issues with calling GetContainerTableView() on Sections.
newky2k/MonoTouch.Dialog,migueldeicaza/MonoTouch.Dialog,ClusterReplyBUS/MonoTouch.Dialog,danmiser/MonoTouch.Dialog,benoitjadinon/MonoTouch.Dialog,Milan1992/MonoTouch.Dialog,jstedfast/MonoTouch.Dialog,hisystems/MonoTouch.Dialog