Add percentage support in the New Responsive Designer

The original "Responsive Designer" supports percentages. It adds a text field that's formatted for percentages and connects to the list's number column.

The new responsive designer adds a number field without any formatting options to support percentages. It displays and edits the percentage value as a decimal (e.g. .5 for 50%). We would like to see an option to support percentages in the number control. It could be listed in the Numeric Type setting. A column formatted as a percentage should be added to a new form with the correct formatting automatically.