Can we have runtime events for layouts?

Can we have runtime events for layouts? Specifically:

Undocumented events

1. beforefirstlayoutstart
2. afterfirstlayoutstart
3. afterlayoutstart

Needed events

1. beforelayoutstart

Most especially beforelayoutstart, since running plugin tasks after the event trigger On layout start causes timing issues. I currently need to do plugin calibrations before the event sheet starts.

It looks like an oversight that "beforelayoutstart" is missing, as there exist other events for the SDK and events for scripting for all four events. I've added "beforelayoutstart" for the next beta, and will document the other three events at the next stable release too, so you can start using those already.