Support Behaviours on Issue View#100

As a ScriptRunner Admin,
I would like to set up behaviours on issue view,
So that I can apply my business rules throughout the workflow of my issues

Pleaes comment with detailed use cases - they are very helpful!

I would like to have this feature as well. It would be somthing that we can apply a rule when a custom field has changed or edited. It has been a limitation what we can do with ScirptRunner in the JIRA Cloud. For example, we are using a formula for the Priority field based on Severity and Necessity. This behavior only limited in the Create issue screen. We would like to set the rule/behavior to update the Priority field when there is a change in Severity or Necessity after the the issue has been created.