L3 - Default Steps to reproduce:
1. login into cockpit
2. select the "Wait State" (or "Cornercase Process" in dev-environment) process
3. select a running process instance
-> Some of the labels are not displayed in the activity instance tree (see attachement (ie9-labels.png)
-> Only if I select such an activity instance node the label is visible
Excpected Behavior:
- The labels are displayed properly.
