function Hide-WPFInstallAppBusy {
    <#
    .SYNOPSIS
        Hides the busy overlay in the install app area of the WPF form.
        This is used to indicate that an install or uninstall has finished.
    #>
    $sync.form.Dispatcher.Invoke([action]{
        $sync.InstallAppAreaOverlay.Visibility = [Windows.Visibility]::Collapsed
        $sync.InstallAppAreaBorder.IsEnabled = $true
        $sync.InstallAppAreaScrollViewer.Effect.Radius = 0
    })
}