Revert "Merged two columns (first and last name) into one (name)."

This reverts commit 346de5881be82c5dff0be4e24e7d50b134f23745.

I'll try another and possibly a simpler approach to this. We just want
the support form to have a single field to minimize the effort in
filling it. The software will split the words and store them in the
existing fields.
Combine the first and last names into a single field

The purpose is to simplify the form and to make it easier to fill. We
still require both names and do validate for that on the server. We
keep them separate, in the previous fields.
Make the support form narrower and centered