menuclick-788215: textContent strips HTML from name
menuclick-788215: textContent strips HTML from name

Using innerHTML worked fine on UAs without Proxy support because the
name highlighting doesn't work on those platforms. The correct solution
either way is to use textContent.

Signed-off-by: Joe Walker <7a17872fbb32c7d760c9a16ee3076daead11efcf@mozilla.com>

mozilla/gcli,joewalker/gcli,mozilla/gcli,mozilla/gcli,joewalker/gcli