EDIT

ref #10202: disable specimen selection or reference selection if the other possibility is already used

ref #10186 further remove ConversationHolder and cleanup

ref #10186 remove ConversationHolder from many forms and some more cleanup

ref #10135: remove createSection again and implement it in versionable and cdmBase element

ref #10135: add created and createdby to an extra section to keep it at the same place

fix #10135: add created and createdby to supplemental data of cdmBase

fix #10098: add timeperiod to creditelement

ref #8777 try to filter CDM Source in Original Sources if no data exist (it is read only)

ref #10057 add accessed to OriginalSourceElements (still without update when citation type changes)

move handleEvent to base class in AbstractOriginalSourceElement