Look into opening the PERT popup up in a separate window

[ashleytowner]

Currently we are subject to the whims of Jira, and when they change the way their page works we might have to rewrite the booklet popup. It could be worth investigating whether it would be feasible to do a separate popup similar to how PayPal handles transactions. I've drawn up a sequence diagram of how that might work:

And here is the mermaid code for that diagram:

sequenceDiagram
    actor User
    participant PERT Script
    participant PERT Window
    participant WebServer
    participant Jira Page
    
    User->>PERT Script: Click PERT Button
    activate PERT Script
    PERT Script-)WebServer: Fetch a form ID
    activate WebServer
    WebServer--)PERT Script: Return a form ID
    deactivate WebServer
    PERT Script->>PERT Window: Open new window
    deactivate PERT Script
    activate PERT Window
    PERT Window-)WebServer: Fetch Form with ID
    activate WebServer
    WebServer--)PERT Window: Return Form
    deactivate WebServer
    User->>PERT Window: Fill in form & Click "save"
    PERT Window-)WebServer: POST Form data with ID
    PERT Window->>PERT Script: Window Closed Event
    deactivate PERT Window
    activate PERT Script
    PERT Script-)WebServer: Fetch form data with ID
    activate WebServer
    WebServer--)PERT Script: Return PERT data
    deactivate WebServer
    PERT Script->>Jira Page: Fill text box
    deactivate PERT Script```