* Make RunningApp.Screenshot do nothing unless SCREENSHOTS symbol is defined
* Replace IApp casts with conditional compilation directives
* Fix warning
* Remove EnableLocalScreenshots
* Add Ignore attributes to keep tests from "failing" in Test Cloud
In the iOS ViewCellRenderer, GetRealCell in ViewCellPropertyChanged was returning null and passing it to UpdateIsEnabled. SetRealCell was never being called in ViewCellRenderer and the RealCellProperty was never being set.