use standard form validation instead of custom json controller's methods, support to apply the commment section component on entity not yet created (will be created with the comment)

refactor: no need for InlineCommentView, nicer id on comment forms. Also properly fix #473629: register/login link should appears on the top of the form when clicking "add comment"

fix #816385 by [re]loading only new/edited comment and properly edit the DOM using js. Also: cleanup javascript, try to put form where the comment will be located (not yet finished)

[views] ticket #474762, login link next to comment redirect to the login popup and does not leave the current page

           miss an arg