This PR ensures that the form status (e.g. colored accents) are rendered appropriately without spamming the UI with input errors.

This is an improvement on Ben's suggestion to block validation until user interaction, which originally was not properly indicating when forms were invalid (at a high level) before interaction. This was missed because we only used this feature on pop-up forms that were not showing this.

While this was discovered and tested on the Path Expansion page, it's actually more appropriate for that page to have suggested requirements than interaction-based validation. So this was also updated in this PR.