[web api] unify 'contentnav' (VComponent) and 'boxes' registries as 'ctxcomponents' (CtxComponent)
# rename cwprops for boxes/contentnavigationforxinrql('Any X,XK WHERE X pkey XK, ''X pkey ~= "boxes.%s" OR ''X pkey ~= "contentnavigation.%s"').entities():x.set_attributes(pkey=u'ctxcomponents.'+x.pkey.split('.',1))