Fixed keyboard implementation of existing controls to work with AutoFocus
Changes to AutoFocus to not preventDefault when no action was performed, to allow scrolling. Changed KeyboardBehavior to no longer block scrolling.
Added fixes to BackButton, FlipView, ListView and Rating
Fixed a pivot item offset issue
Update version to 4.0

[Finishes #82816562]
Merge branch 'master' into AmazingJaze/CascadingFlyout