[meta] Simplify complex form elements where possible

@Chi not everything needs to be hard coded into two separate inputs.

A phone number could be 3 separate fields, or just one:
(555) 555 1212

It is becoming much more common with credit cards too. They used to be 4 or more separate values, but now are just one (with JS & CSS to make them look like more than one).

The height/width fields could be just one, where they are separated by an "x".

JavaScript could interpret a space, comma or "x" as the separator between the height & width.

Got it.
For numeric values I think it is better to use multiple number inputs wrapped into fieldset instead of a single text input.

I think we need user testing before moving ahead on this, so tagging Usability.

I'm marking it postponed as ultimately we need to do user research on this to determine if this is a good pattern or not.