See linked issue.
Linked Eclipse BZ marked as fixed
Not fixed in JBTIS 4.1.3.Beta5 (BPMN2 Editor 1.0.0).
Bob commented on the linked BZ: "Marek, this fix is included in the 1.0.1 service release."
Thanks Kris, I will verify on 1.0.1.
Verified on http://download.jboss.org/jbosstools/updates/integration/kepler/integration-stack/aggregate/4.1.3.CR1