Trigger fos_comment_new_comment before appendComment

When doing a reply, the form is removed from the DOM in appendComment. Because of this, fos_comment_new_comment would never trigger for replies (because the form was no longer in the DOM). With the changed order, fos_comment_new_comment now correctly triggers an event.

This might break BC!

Note: fos_comment_submitted_form still won't trigger for replies because at this point of the code, the form is already gone from the DOM.