Steps to reproduce:

1. login into cockpit (start cockpit in dev-environment)
2. click on process definition "Cornercases Process"
3. click on first process instance
4. inspect serializable variable "cockpitVar"
5. change any value, for example the value of the attribute "name" from "test" to "testaaaa"

-> The "Change" button is still disabled

Expected Behavior:
On change the "Change" button has to be enabled.