[migration] use eschema.type for nicer display when confirmation is asked

[base template header] changeset 6669:e4532c6acf34 introduce a visual regression on standard site, fix it by merging header-left/header-center context, it simplify things and have proper display. Cubes using 'firstcolumn' css class will have to be upgraded

[timetable view] ensure we actually have a user in the rset cell

cleanup

[c-c list] tell more about the pb when some cube information is missing

[repository] don't crash when cascading delete a relation, this may let the database in an inconsistent state anyway, so simply log the error

[ms planning] test and fix bad plannification of a query used on cascading delete of a deleted (external) entity relations

[ms] fix error in synchronisation: local_eid return a 2-uple

[ms test] fix nasty cache effect break unittest_multisources.test_not_relation since introduction of local_eid method andfor full dereferencement of external eids

[c-c reset-admin-pwd] don't crash on unknown option, and silently ignore 'adapter' which may be present in pre 3.10 sources file

[component] restore logo position in left column

[boxes] PossibleViewsBox is contextual, StartupViewsBox isn't

stable is now 3.10

backport stable

oldstable is now 3.9

[repo] don't attempt to read sources from database on quick start. Fix crash after restoring a pre 3.10 database