EDIT

Minor cleanups in appimport

Add first version of Edaphobase importer and some clean up

adapt the import classes to the new return type ImportResult

fix compilation error in app-import

Correct publish flag import for BM import

Minor improve E+M import

Adapt EM area hierarchy to filtering rules #3904

Also moving hidden area functionality from activator to occurrence
import class.

Improve E+M-Activator and E+M occurrence import

Improve E+M import post methods #3979

Improve E+M import for transmission engine #3979