This feature is available starting with Blitz Actions 4.1.0
Many of our clients requested Blitz Actions to provide the possibility to have a screen succession instead of a single screen in the JIRA issue. The screens would involve complex interactions in which a certain field depends on one, two or more fields, eventually looking into a database or LDAP, and so on.
This being said, we decided to implement a wizard enabling you do design and establish an entire flow inside a single button. You can now create cascading fields inline in the page, going through the steps you define.