Reminder for pre-export

[Luux]

There should be a reminder for pre-exporting the scene or automatic pre-export (i don't know how long it will take when pre-exporting larger scenes, so maybe at least an option for that?)

We often forget the pre-export and then either we wonder why changes don't have an effect or the unity editor crashes instead.

Is it possible to add some kind of notification when the pre-export should be done?

[CalvinSchulze]

This is sooo important! This is consuming so much time...