EDIT

Externalizing model strings

ref #6598 Fix recursion of parts in save handler

ref #6906 Fix delete handler

ref #6906 Fix selection for supplemental, details and descriptive view

ref #6906 Fix move operation

ref #6906 Migrate media view context menu

Add icons to menu items

ref #6906 Migrate media view

ref #6905, #6597 viewer handling

ref #6905, #6597 Move part initialisation to sub classes