Summary:
- WelcomeQuestions implements the new popup.
- Popup shows up on any doc-list page, the first time the user visits one after
signing up and setting their name.
- Submits responses to the same "New User Questions" doc, which has been
changed to accept two new columns (ChoiceList of use_cases, and Text for
use_other).
- Improve modals on mobile along the way.
Test Plan: Added browser tests and tested manually
Reviewers: alexmojaki
Reviewed By: alexmojaki
Subscribers: jarek
Differential Revision: https://phab.getgrist.com/D3213
