Scroller: scroll bar depth calculation properly accounts for an IScrollContainer (closes #774)
ImageLoader: added textureQueueDuration, a property to be combined with delayTextureCreation to allow textures to be uploaded over time, improving performance while still allowing textures to be created (closes #772)
HorizontalLayout, VerticalLayout: properly calculates scroll position for indices less than beforeVirtualizedItemCount
Themes: fix for handling lost context (closes #773)
ScrollText: support for hyperlinks, including support for TextEvent.LINK, which becomes Event.TRIGGERED (closes #431)
MetalWorksMobileTheme: better scroll text font choice
Gallery: item renderer uses delayTextureCreation and textureQueueDuration for smoother scrolling