The "VueJS" modal is an epic on it's own (epic #14820). As part of the integration with Test Plan we propose to have a first step with a "create" modal that would only have:
- Title (and actually all string fields so "automated tests would be there)
- Test steps
If the tracker is configured to have other fields mandatory, the modal is not used and we fall back on story #14888 (create with artifact view).