EDIT

fix potential multiple representation exceptions in distribution editor, session dispose did not work

changes in distribution editor

ref #6925 Set conversation and cdmEntitySession to null for dispose

ref #6925 Dispose conversation and entity session when closing editors

• use session from editor input if provided

ref #6159: smaller changes in distribution editor

ref #6925 Open distribution editor in editor area

ref #6913 Remove IEditorInput dependency from checklist editor input

ref #6909 Evaluate preferences for open distribution editor

ref #6159: disable descriptionElementDetails for distribution editor

ref #6159: minor