Stunner - Escalation events

Add support for the following escalation events to the palette:

1. Boundary interrupting event
2. Boundary non-interrupting event
3. Throwing event

As Aimee I want to escalation situations in a subprocess to the parent process so that I can react on non-critical events ( not an error ).

Implementation details & specification of the supported properties per event type:

Start Event:
The start escalation event only apply for the "Event Sub-Processes"

• Event Sub-Process
  • Name:
  • Documentation:
  • IsInterrupting: true/false (by default value is true).
  • EscalationCode:
  • Data output:
  • UI: Event border is solid when IsInterrupting == true, and dashed when false.

Boundary interrupting/non-interrupting event:

• Name:
• Documentation:
• CancelActivity: true/false (default value is true)
• EscalationCode:
• Data output:
• UI: Event border solid when CancelActivity == true, and dashed when false.

Catching intermediate event:
Only the boundary version exists.

Throwing intermediate event:
In normal flow, the Escalation Intermediate Event raises an Escalation.

• Name:
• Documentation:
• EscalationCode:
• Data input:

End event:
The escalation end event raises an escalation

• Name:
• Documentation:
• EscalationCode:
• Data input: