Also makes the mod display initialization sequence (start expanded, then
unexpand) controlled by HUDOverlay rather than mod display itself. This
enabled different treatment depending on whether the mod display is
viewed in the skin editor or in the player.
Co-authored-by: Bartłomiej Dach <dach.bartlomiej@gmail.com>
In order to make `highlightedColour` dependent on the mod type color, the color is converted to an `osu.Framework.Graphics.Colour4` and calls `Lighten`.