also refactor comment oneline view on the way

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)

- self.varmaker is now defined on self._cw
- self.initialize_varmaker is not required anymore

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

        adding a comment

         comment if it has the permission to do it

[views] ticket #154096, propose delete action for user who has permission to delete and only on comments who do not have comment children

[views] ticket #343859, improved RSS view of a comment adding a link in the description to the entity the comment comments

[views] ticket #342902, propose to login or register depending on context when anonymous want to post comment