Intended to add toggle but forgot.
This also fixes https://github.com/ppy/osu/issues/37012 via a convoluted
refactor of a lot of stuff. The basic overview is:
- Moved all replay overlay concerns out of `HUDOverlay`. We can display
this above everything confidently (i think).
- Split out `ReplayOverlay` and `ReplaySettingsOverlay` so the base
class can handle the visibility, hotkeys and everything that should be
shared with *all* replay overlay components going forward. `Ctrl+H` is
supposed to hide any of these kinds of details, and I'm sure we'll add
more in the future.
- Reorganised some things in `Player` so the new structure would work.
Mainly the overlays which add a black layer during fade out.
Dean Herbert
279effe23c