edit-jobset.tt: Retain old inputs with dashes in their name

Dependencies

• [2] VZX6HJ3I Fix jobset input handling in the API
• [3] NIX2TKYV Use redirectJSON
• [4] TQVKZQUG Use the REST API in the web interface for editing jobsets
• [*] OX6NYJDV Split viewing and editing a jobset

Change contents

• replacement in src/root/edit-jobset.tt at line 186
  [2.549]→[2.549:607](∅→∅)
  − var match = elem.name.match(/^input-(\w+)-(\w+)$/);
  [2.549]

  [2.607]
  + var match = elem.name.match(/^input-([A-Za-z][\w-]*)-(\w+)$/);