Reestores autoresize to original, experiment didn't work
Only resizes current numRow

Must be moved into addRow as well. Don't know why .num-row
and .text-row have slightly different vertical padding,
but it doesn't matter, this will fix it.
Improves row height matching, edits todo's and adds notes

"Improves" as in the row heights match more often, but doesn't
pin down the underlying issue.
Matches syntax, though unnecessary
Activate and deactivate rows on focus and blur
Removes unnecessary var