[RFE] Add ability to assign layers when using drawio diagram

[PyOctoCat]

It would be helpful to be able to assign layers while mapping out a diagram, like network and end devices so you can filter the amount of data your are viewing.

[PyOctoCat]

Based on a little homework, it seems like you could leverage parents. Here is a snippet when I edit the drawing to force layers:

[KUMBLE]

It will be really helpful if you could add this feature.