integrate Celso's work on translation file: proper/complete spanish translation, fixed some typos in french translation, occured -> occurred fix in various places

[web] fix typo in ajax_build_url (s/xtml/xhtml)

[web controller] don't try to translate arbitrary exception message

[selectors] fix match_transition & introduce new edited_attribute selector

RQLUniqueConstraint not in CWConstraintType for some old instances

[tableview] take care, description may include None (try Any NULL)

fix typo

backport stable

[form, migration] etype_relation_field should not raise error, it may block migration if used for a non yet existing field

fix bug introduced by 6098:a0fde9334dd0

work around Apache's mod_proxy limitation with special chars in URLs by not using Rest urls when such a case is detected

[entity] base_url argument may be explicitly specified for other purpose (eg http/https site version control)

[cleanup] remove debug print

backport stable

[dot] oops, should use dc_title here

backport stable

more generic dot graph generator

backport stable

[login template] missing xml_escape

[primary] backport _rel_label method from the default branch

backport stable

[doc] docstring more explicit for pyviews

[debug] change severity of 'site_cubicweb loaded' message to debug

[primary] handle final relation (eg attribute) in the relations section, and give dispctrl to view's extra kwargs as for non final relation

[entity] entity.view now support initargs as req.view

[schema view] use rdef.ACTIONS, attribute/relation don't use the same actions permission, that causes a crash for attribute rdefs

[tabs] take care, vid may not be a valid dom id (for jQuery at least)

[forms] callable field kwargs now always take form _and_ field parameters + make help kwargs accept a callable too

[forms] test abs() rql function

[schema] consider ETYPE_NAME_MAP when deserializing specialization relations

fix the fix

fix missing import in web.request

backport stable

[migration] when some inlined relation definition is added to an entity type which has some specialized types, it should be propagated to those types else they may miss the necessary table column to store the relation

[migration] dont crash if a group doesn't exists (it may not exists yet)

[migration] fix rename_entity_type bug: not putting eids of relation deleted using sql query may cause later error on commit, complaining on missing relation on an entity which has been actually deleted

[migration] fix crash when adding symmetric relation type

[db-create] fix bug introduced by 6060:353bec342e2a (we ask for user while in non verbose mode)

[session] should be _cw, not req

[primary] use a new rtypevid flag in primary view display controller, allowing to tell the view for a non final relation should be called as an attribute view (eg, not on the target rset)

[cwprops] fix callable vocabulary of cwproperties which were inconsistently called. No more argument, should now simply return a list of (untranslated) values

[vreg] rename select* object id argument to avoid name clash with arbitrary kwargs, just in case...

[primary] refactor primary view handling of relation's label to properly handle label optionaly specified in dispctrl (no more default set) and use contextual translation by default. Also, consistent handling in attributes, relations and sideboxes section. Introduce new support_args function to use when possible instead of try/except TypeError.

backport stable

[doc/book] note about bootstrap_cubes file

[request] missing paren

[request] js is defined in uilib, not utils

[request] enhanced user[_rql]_callback method, allowing to call other js variant, eg one of userCallback, userCallbackThenUpdateUI, userCallbackThenReloadPage (the default). Also benefit from the new magic js object.