More layers for events in the Chart editor

[LocalVarBright]

In the current chart editor, there's only one layer/section for placing events, and with events like zoom, focus camera occurring on the same beat, its really messy to look through them. So I'm suggesting to add upto 3 - 5 layers to support multiple events in one beat. I find it finnicky to either place the events just a very small time distance away from each other, or just stack the events in one square. (plus there's this bug where a ghost event appears which doesn't get deleted and does freaky stuff).

So yeah. More layers.