Merge branch '4.4.0'

diff --cc Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Xamarin.Forms.Controls.Issues.Shared.projitems
Simple merge

diff --cc Xamarin.Forms.Controls/XamStore/StoreShell.xaml
Simple merge

diff --cc Xamarin.Forms.Controls/Xamarin.Forms.Controls.csproj
Simple merge

diff --cc Xamarin.Forms.Core/BindableObject.cs
Simple merge

diff --cc Xamarin.Forms.Core/Element.cs
Simple merge

diff --cc Xamarin.Forms.Core/Profiler.cs
Simple merge

diff --cc Xamarin.Forms.Platform.MacOS/Xamarin.Forms.Platform.macOS.csproj
Simple merge

diff --cc Xamarin.Forms.Platform.iOS/Xamarin.Forms.Platform.iOS.csproj
Simple merge