EDIT

catch another widgetIsDisposed error

avoid widget is disposed exception

fix multiple representation by removing conversation of selection dialog

minor

fix #7088 fix NPE when saving Media in bulk editor

fix NPE in bulkeditor

remove conversation from selectiondialog

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

avoid widgetIsDisposed exceptions by check of control is disposed