Fix bug 1302583 (#465)
Fix bug 1302583 (#465)

Hardcode jQuery path and check trusted origins on postMessage.
jotes/pontoon,participedia/pontoon,jotes/pontoon,jotes/pontoon,participedia/pontoon,mozilla/pontoon,mathjazz/pontoon,mastizada/pontoon,participedia/pontoon,mozilla/pontoon,mozilla/pontoon,mozilla/pontoon,mastizada/pontoon,participedia/pontoon,mastizada/pontoon,mathjazz/pontoon,mathjazz/pontoon,mozilla/pontoon,mathjazz/pontoon,mastizada/pontoon,jotes/pontoon,mathjazz/pontoon