ref #6925 Set conversation and cdmEntitySession to null for dispose
ref #6925 Dispose conversation and entity session when closing editors
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
ref #6159: details of selected distr are shown for distr. editor
ref #6925 Fix part initialisation for open handlers
Checklist editor changes
fix NPE in Distribution Editor
further migration issues for distribution editor
migrate Distribution Editor to e4