v0.9.0-preview.200425.2

Features:

• NavigationView control

Notable changes:

• afbbc8a Use custom VSM to fix transition issues
• 93da03f Fix issue where SplitView overlay prevents clicking title bar buttons
• e0443a3 Fix SimpleStackPanel issue with hidden children (#74)
• 208bdba Fix issue where IconElement.Foreground isn’t always respected