The prompt should have:

• list of recently opened projects
• open project from directory
• create new project using a template
  • take inspiration from workflows of different modelling tools already used with Toolbox
  • look at projects included in the execution tests
  • simpler workflows that can be used as the starting point/learning
• create a new blank project
• never show the prompt again toggle; flow is now: startup prompt ▶️ choose from recent, templates, new ▶️ expert/user mode depending on last project state

Notes on implementation

• use stacked widgets to "replace" windows
• also used by expert/user mode implementation

Related

• StartupBox: Templates and Tutorials categorization #2757