showFadingOnlyWhenScrolling does not respect startAfter

[dmrickey]

When showFadingOnlyWhenScrolling is true, it should only show the "fade edge" when the text is scrolling. But the edges always start off faded and this value is only checked when pauseAfterRound is set. So by default, if I have a 10 second startAfter so the text just sits there for a while after the widget is first built, it still includes the fade edge until after it's done scrolling and pauses again for pauseAfterRound.