Fixed Bug 1033621 - Make a simpler lightweight version of add comment

It's a custom data attribute that I used so that the bugid can automatically be filled in to the form. Here's a link to the w3.org doc for further reading: http://goo.gl/m0b1JR. I did make a mistake and it should be labeled data-bugid instead of just bugid which I will amend now. Please let me know if you need anything further.