EDIT

minor

ref #7793: show supplemental data for distribution editor and smaller bugfix for distribution editor preferences

Use image resources for button image

Remove unused dependency

ref #7674 Add icon for different description types

import/export should not be shown whithout connection

ref #7793: fix problem with details view after save in distribution editor

Fix saving of FeatureTreeEditor

Fix possible ClassCastException

ref #7793: smaller changes in original sources part