[web] kill GMTOFFSET (closes #2154655) Its last user, set_cookie(expires=...), can just as well interpret its argument as UTC. Naïve datetime objects with an implicit non-UTC timezone are just awful.

[web/request] don't play tricks with utc offset We need an UTC datetime from a time.time()-type value. It turns out datetime provides a method to do just that. Related to #2154655.

[server/test] Drop dependency on folder cube Just copy schema bits when needed and drop a view (not possible anymore) in unittest_repository. Closes #5168939.

[web/test] Drop folder cube dependency Copy useful schema bits, define IBreadCrumbs adapter for Folder/fild_under (previously relying on ITree adapter) and adjust unittest_viewselector tests to drop a view that does not exist anymore. Related to #5168939.

merge 3.20.6 into 3.21

[web/views] Allow changing CSVView's separator (closes #5227442)

[web/view/treeview] add a 'selected' class on <li> if the entity's url is the currently displayed url An alternative would be to refactor the corresponding view so that controlling css classes wouldn't require overriding a 5O-lines method. Notice by default there is no associated class in the CSS so there is no rendering difference unless one explicitly add rule in his CSS file.

Added tag cubicweb-version-3.20.6, cubicweb-debian-version-3.20.6-1, cubicweb-centos-version-3.20.6-1 for changeset 7f64859dcbcd

[pkg] 3.20.6

[notification] don't block while sending mails Regression from #7c17659c9eae, closes #5190001.