Edit

ref #6596 Add SaveHandler for specimen editor

ref #6596 Enable "Save" icon when specimen editor is dirty

ref #6596 Implement framework for accessing the selection providing part

• All AbstractCdmViewparts now keep track of the part that has provided the last selection. This is necessary during e4 migration to simulate the e3 behavior having IViewParts that edit object of IEditorParts
• this can be removed/refactored when fully migrated

ref #6596 Keep track of active "editor"

• Add IE4SavablePart to E4 parts that can be saved
• SaveHandler will recurse through selection providing parts to find savable parts that can be saved

ref #6596 Fix FieldUnit creation when linked with taxon selection