`STM` buggy when used with `NestedEvents` feature

[chuckn0rris]

Forum post

https://bryntum.com/products/schedulerpro/examples/nested-events-configuration/

Enable STM using config for ProjectModel

stm : { autoRecord : true }

Drag and drop event, call in console

schedulerPro.project.stm.undo()

See: nothing happened.

Try to create new event using dnd. See error in console

[canonic-epicure]

Prioritized by Mats request

[canonic-epicure]

Need to also explicitly enable stm, to make it work, just having autoRecord : true is not enough (see https://github.com/bryntum/support/issues/8994). Also can not reproduce the exception after undoing drag create. Probably these 2 were fixed.

I'll be checking also the test cases from user.