Moving high relevance commercial component between 2nd and 3rd container

Results from previous a/b test show it has no negative impact

Also, don't show component if there is only one container on a page 
Nope. Currently if there's one container we show the container, then show this high relevance commercial component, then show the low relevance one, which looks odd. This makes sure there's always at least one container between high and low relevance commercial components.