ref #6596 Refactored selection handling to support e3 and e4 parts

fix #6527: refactor media deletion configurator and the corresponding wizard

ref #6566 Fix potential StackOverflow when linking with taxon selection

ref #6566 Removed unused classes and properties

ref #6566 Fix open handler for specimen editor

ref #6566 Migrate "Open in" context menu for specimen editor

Merge branch 'develop' into derivateView

Conflicts:¶

eu.etaxonomy.taxeditor.editor/plugin.xml¶

fix #6669 Refresh context menu before it is drawn

ref #6566 Adjust SingleRead context menu items visibility

ref #6566 Migrate "Open in.." context menu items for specimen editor