Revert "Popup: Moving function fitSegmentInsideSegment into the popup prototype."

This reverts commit 01b35afb2c2201bb441a7a4adadd225679fb75e9.
Revert "Popup: Factor our width constraint code for reuse."

This reverts commit 3636c70ffd1e168c6a087420273cbb3556e514ef.
Added FAQ doc for help relating to changing the values of enhanced form elements
Merge pull request #5597 from mlynch/faq-enhanced-elements

Added FAQ page for help relating to changing the values of enhanced form elements. Thanks Max Lynch!
FAQ: add remaining form questions