cleanup module namespace but only importing the formwidgets module

fix deprecation warnings

fif inlined relation forms pb w/ new ajax forms. We've to ensure the varmaker is properly initialized when generating a form where we may add new subentities, which will use ajax call to generate the subform while this subform expect a varmaker to be set.

now that we are property initializing autoform_section for the 'inlined' form type, use it...

[uicfg] fix autoform_section rtags initialization 1. when a relation is marked as inlined in the 'main' form type, we want its opposite (eg when one the other side of the relation) to be marked as hidden in the 'inlined' form type 2. when no section is specified for the 'inlined' form type, use the same as in the 'main' form type to do this properly, we need two initialization stages. The first one to handle 1., the second to handle what was done before and 2. We can't do this in a single stage because we've to know the bare value of the "opposite" tag.

cache result of the COUNT query used to see if a non unique attribute may be used as rest path on the entity instance to avoid recomputing it later

incontext view of EmailAddress is a mailto: link

add CWProperty for_user CWUser when on the user primary view

move CWProperty rtags from autoform to cwproperties module.

fix Bytes submission pb on POST, due to multiple call to field.process_form_value for a same field. In the case of file, stream.read() doesn't return file's data the second time (since the cursor is at the end of the file). Fix this by having a generic process_form_value method that cache field's value in form.formvalues[field] and so _process_form_value is only called once. You should then override that later method on custom fields.