Add support for layered hit sounds skin option
Implement rate adjustment for storyboard samples
Standardise all tournament tests to use placeholder data
Increase coordinate parsing limits
Add text explaining a second copy will be made on importing beatmaps
Add classic "Welcome" intro
Update framework
Fix editor drag selection not continuing to select unless the mouse is moved
Fix exception when dragging after deleting object
Don't activate run tool window on rider run
Fix player not exiting immediately on Alt-F4
Bump ppy.osu.Game.Resources from 2020.602.0 to 2020.622.1