Backout "[web/navigation] use add_onload instead of inline javascript href"
This reverts changeset 170e1437948d, for at least two reasons: the
PageNavigationSelect component was not updated for the new type of
navigation links, and external cubes defining View.page_navigation_url
exist in the wild and also got broken navigation links. This reopens
#3501626 and closes #3677945.
