Changing event type from "interrupting" to "non-interrupting" should retain properties

[fml2]

Problem you would like to solve

I'm always frustrated, when I change the type of a start message event from "interrupting" to "non-interrupting" (or the other way around) and the properties of the event are lost (e.g. the message name).

Proposed solution

Retain all element properties if its type is changed from "interrupting" to "non-interrupting". This should be applied for all element types that have those two sub-types.

Alternatives considered

Without the proposed feature, I have to manually enter the properties again.

Additional context

Depends on bpmn-io/bpmn-js#2249.

[nikku]

I can reproduce by replacing a * boundary event with the non-interrupting version:

I cannot reproduce by changing an element to be "non-interrupting":

[fml2]

For a start message event (e.g. in a event based subprocess) the properties get lost in both cases.

[nikku]

Linked upstream bug.