Removes SourceDirectory field (no longer in InstallContext), adds dynamic Heading/Subheading/InstallDirEditable for FreshInstall vs Update mode, and updates XAML to match sibling page style.
Removes SourceDirectory field (no longer in InstallContext), adds dynamic Heading/Subheading/InstallDirEditable for FreshInstall vs Update mode, and updates XAML to match sibling page style.