No more casting!
This also - Renames TextAwesome to SpriteIcon. - Removes the default size of "20" from SpriteIcon (now defaults to the underlying texture size).
Most issues were related to BeginLoopedSequence usage and lack of "this." in front of transform helpers.
Depends on https://github.com/ppy/osu-framework/pull/837
We don't want to start polluting the OsuColours namespace with non-UI colours.
paired with smoogi