This first reverts the following 2 commits: 566c0c5f 3a08c758

to at least fix the issue that the context method takes 2 arguments that aren't available from FormBoxEditor.edit() without slowing things even more.

About deferred style (widget editor objects passed by arguments to activities), the regression in commit a5a2f1cd is solved differently, by customizing the serialization of ERP5 objects into their paths. This would not work with contexes that are temporary objects but there's no known case so far and computing the context twice does not garantee that the result would be the same if the REQUEST is different.

This also removes the unused view() method on editors.