TextListComponent::isScrolling() now only returns true if the key has been
held down long enough for scrolling to really start.
Fixed opacity for RatingComponent and DateTimeComponent.
Exposed some more of AnimationController.
Added GuiMsgBoxOk and GuiMsgBoxYesNo, basic message boxes.
Added rating scraping to TheGamesDB scraper.
Added warning if platform ID is not set for a system the user has selected
to scrape.