fix typo

[download box] refactor to ease when one want to propose multiple elements to download

[basetemplates] breadcrumbs component context sticks to ApplicationName

[basetemplates] define header ctx components categories as attribute to ease overriding

[migration] put some migration context info in doctest environment: __file__ and __args__

[windmill tests] use extra timeouts, else we get failure simplu because we didn't wait enough

[devtools] make migration handler easily available from CubicWebTC through .shell() method So we are able to use shell/migration helper methods directly from test cases.

[ldap] make instance still usable if we can't contact ldap server

[change state form] set domid to avoid data conflict with other (eg edition) form

[action] set mainform=False to ensure we don't consume previously posted form validation errors

[forms] remove some deprecation warnings

backport stable

update note

[shell, testlib] return doc test results in process_script and new assertDocTestFile method on CubicWebTC

[migration] fix rqliter when some query arguments are given