[forms] Do not raise errors on composite required relation being deleted The entity included in the composite will be deleted in such a case, so the field is not required even when the cardinality is '1' or '+'. Related to #8529868

[edit controller] Cancel RQL queries to be performed on entities to be deleted Composite relation removal via the EditController trigger an entity removal. Changes on such a to-be-removed entity must be cancelled as they may trigger integrity errors before the deletion occurs. Closes #8529868.

[edit controller] fix handling of removal of subentities from an edit form In CubicWeb 3.18 the semantics of dropping a composite relation were changed. It had before the effect of deleting the subentities. Now the edit controller must handle this by itself (it was not adapted then by mistake). So if it detects the removal of a composite relation (on the browser side, the user clicked on the "remove" action), the subentity is now explicitly deleted. It was chosen not to change the form generation but the EditController: - to ensure pre-3.18 forms backward compat - to avoid the introduction of a specific entity-deletion API (RQL is probably our best API for complex DB operations) Related to #8529868.

remove unused import

[editcontroller] a slight code reorganisation, in preparation for a fix * `entity` defined at method entry * a combined `continue` and a dedent of the next big block * some vertical white space Related to #8529868.

[sources/native] ask permission to continue restoring even if metadata do not match (closes #7771864) Moreover we try to clarify the message (Expected/Found was never too clear for users).

[views] fix ProcessInformationView: SESSION_MANAGER can be None (closes #5753280) eg. with pyramid. (grafted from 6a07c2dc3d85f4de0cf48221607e02c4473e11e4)

[web] Move "display all"/ "back to pagination" link generation into the navigation component This makes the html generation customizable. Closes #9219057

Reorganize source tree to have a "cubicweb" top-level package Basically: mkdir cubicweb hg mv *.py -X setup.py cubicweb hg mv dataimport devtools entities etwist ext hooks i18n misc schemas server skeleton sobjects test web wsgi cubicweb Other changes: * adjust path to cubicweb-ctl in devtools tests * update setup.py to avoid importing __pkginfo__ (exec it instead), replace os.path.walk by os.walk and prepend `modname` here and there * update tox.ini to account for new test locations * update doc/conf.py so that it still finds __pkginfo__.py and CWDIR in doc/Makefile

clean some remaining dust from goa time