Add Safeguard Pop-Up to Essential Questions

[skittishcat]

• Feature description: (Example: Add an exit button)
  Add a safeguard / verification pop-up to all questions that are not listed as optional

• Reason for the feature or improvement: (Example: there is no right way to exit from the application)
  Many of the earlier inputs offer a safeguard to unanswered questions via a pop-up stating "Please enter scenario name/persona's pronouns/goal name/etc.", however, there is none to make sure the question that are answered with yes/no/maybe (related to if the persona would form subgoals, know what action to do, and know if said action are correct).

• How does your idea fit with the aim/scope of the project? (Example: feature gives the workflow)
  This idea fits the aim of the project as it makes this tool more accessible by preventing error. Knowing and documenting how a persona would think at each step is a crucial part of this process and so making sure this data is collected is important

• What are the merits of the feature? (Example: prevent data loss)
  This feature would help make sure that users are entering in all the data they need to while using this tool and therefore make sure that they get the most detailed results possible in their spreadsheet (right now, unanswered questions like these will cause users to get "undefined" cells in their spreadsheet).

• Screenshots, if you can show something similar, or a sketch:

• Any other information:
  I would be happy to tackle this issue and submit a PR to help implement this feature if maintainers think this is a beneficial feature