Feature to determine if onPreSaveModel, onPostSaveModel on ModelObserver are called due to autosave

[hanneseklund]

Use case is to do things that are potentially time consuming or disruptive to modelling in onPreSaveModel/onPostSaveModel.
In these cases it is desirable to exclude events caused by autosave.

Possible implementation:
add a parameter to the event with the path actually being saved (can be compared to model.path)
and/or a parameter explicitly indicating the cause of the event (autosave, save, save a copy as, etc.)

[Fredosixx]

I support this request, especially to have the new name of the file.