FIX default package generation
Add support for Custom Actions
Improve e4 Context Menu rendering
Improve e4 handlers robustness
Improve e4 editors life cycle
FIX e4 Undo/Redo enablement on part change
Add e4 Editor Save As support
Improve e4 Status model
Add e4 Status model specific notation
FIX merge Artifacts action
FIX merge entities helper
Add Load Artifacts File Content action
FIX various UI Framework bugs