Camunda-modeler: Variables are disappeared while copying Signal Throwing Event

[r-n-aliev]

__Description__

When it's necessary to duplicate Signal Throwing element with "copy-paste", the Variables list of the new Signal becomes empty

__Steps to Reproduce__

1. Open test diagram (create Signal Throwing element, with a few variables (key-value) in its tab "Variables")
2. Ctrl-C it, and paste it to another place by Ctrl-V
3. Open its tab "Variables"
4. Variables list is now empty

__Expected Behavior__

All attributes of duplicated element are equal and Variables list is the same (by count and values)

__Environment__

• OS: Windows 7, Windows 10, macOS 10.13.6
• Camunda Modeler Version: 2.2.4, 3.4.1

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Screenshot:

[barmac]

I can reproduce this.

[barmac]

Will be fixed via https://github.com/camunda/camunda-bpmn-moddle/pull/54

[nikku]

Closed via https://github.com/camunda/camunda-modeler/issues/1690.