[Feature Request] Notify on Invalid Volumes of Timing Lines

[Regraz]

Possibly adding features to check invalid hitsounding volumes of timing lines like? Not sure if the case applies for MV (because clicking on it will crash the osu! client) but can be useful when there are huge amount of lines in the timing panel and when people use external programs for hitsounding which can potentially cause such issues.

[Naxesss]

Sounds like a decent check, yeah. Will add to todo.