Apparently useful in modding workflows when you want to test out a few
different variants of a thing.
Re-uses `Ctrl-L` binding from stable. Some folks may argue that the
dialog makes the hotkey pointless, but I really do want to protect
users from accidental data loss, and also if you want to power through
it quickly, you can hit the 1 key when the dialog shows, which will
bypass the hold-to-activate period (which wasn't intentional, but so
many people want a bypass at this point that we're probably keeping that
behaviour for power users).
* Calculate hit windows in performance calculator instead of databased difficulty attributes
* Apply mods to beatmap difficulty in osu! performance calculator
* Remove `GreatHitWindow` difficulty attribute for osu!mania
* Remove use of approach rate and overall difficulty attributes for osu!
* Remove use of hit window difficulty attributes in osu!taiko
* Remove use of approach rate attribute in osu!catch
* Remove unused attribute IDs
* Code quality
* Fix `computeDeviationUpperBound` being called before `greatHitWindow` is set
- Caches `DrawableRuleset` in editor compose screen for mania playfield adjustment container (because it's used to wrap the blueprint container as well)
- Fixes `ManiaModWithPlayfieldCover` performing a no-longer-correct direct cast with a naive-but-working approach.