Simplify format for dropdowns with labelled values in the Form Builder

[twschiller]

Context

• The Form Builder supports dropdowns with labelled values
• For dynamic data (e.g., returned via API), putting the data in the right structure requires convoluted JQ

[4626433]

https://app.pixiebrix.com/activate?id=@pixies/slack/slack-sidebar uses a big jq brick for the channels as an example, could at least be a simpler operation

[github-actions[bot]]

This issue will be closed in 7 days unless the stale label is removed, or a comment is added to the issue.

[github-actions[bot]]

This issue was closed because it has been stale for 7 days with no activity.