Returns the overall coordinate of the top or left of the first visible month depending on the current MonthViewScrollDirection. If scrolling vertically, this returns the top coordinate of the first visible month, otherwise it returns the left coordinate of the first visible month.
Target Platforms: Android 4.4+, iOS 8+
Development Environments: Visual Studio 2015+, Visual Studio for Mac Preview, Xamarin for Visual Studio 4.2+
