Add data-allow-new to testcase tagging input.
Add data-allow-new to testcase tagging input.

shinglyu/moztrap,shinglyu/moztrap,bobsilverberg/moztrap,bobsilverberg/moztrap,bobsilverberg/moztrap,mozilla/moztrap,mccarrmb/moztrap,bobsilverberg/moztrap,shinglyu/moztrap,mozilla/moztrap,shinglyu/moztrap,mozilla/moztrap,shinglyu/moztrap,mccarrmb/moztrap,mccarrmb/moztrap,mozilla/moztrap,mccarrmb/moztrap,mccarrmb/moztrap,mozilla/moztrap