[views/templates] provide a modal main template (closes #3274672) The current NonTemplatableViewTemplate may seem to provide the desired feature if a '__notemplate' is provided in the form, unfortunately, it: * wraps the view in a spurious div * calls view.set_stream(), which has the effect of wiping any js/css resource recorded until then by the view, leading to hard-to-track missing resources symptoms

sql('DROP FUNCTION IF EXISTS _fsopen(bytea)')
sql('DROP FUNCTION IF EXISTS fspath(bigint, text, text)')