Timing points can't fallback to defaults and must be added at least once.
Will be removed in https://github.com/ppy/osu/pull/6604
This is not a great idea.
In line with stable editor restrictions
This is what stable did.
Not sure why these aren't being detected on master right now - they should be...
This reverts commit 3113a55a98.
3113a55a98
Less static weirdness
Fixes up deserializing.