[GSS-RFE] Open reusable subprocess diagram when clicked over parent diagram

BAPL derived from BAPL-1465

Account: Enel Servizi Srl, 1481946

Goals

• Open the diagram of the reusable subprocess when clicked over it in the parent process diagram (based on Stunner diagrams)

Motivation

• When a node is stoped in a subprocess is not easy for the user to drill down into such subprocess to know exactly which task is pending there. The expected usability is clicking on that subprocess could open that subprocess so it could be explored.

Expected behavior

• This BAPL only affects Stunner based processes
• Double-clicking the reusable subprocess in a parent process diagram should open the subprocess.
• The page of the subprocess opened should be positioned at the tab "Diagram"
• A single click on the reusable subprocess should keep the current behavior. It only selects the node, to allow the user to trigger, retrigger or cancel the node by the actions on the action panel

Current behavior

• It only selects the node (to allow the actions mentioned above)

Testing

• Unit test coverage according to repository thresholds.
• Limited scope Selenium tests assessing basic functionality of the feature.