Relax collapse's descendants selector

Using an equal selector on the data-toggle attribute prevents the ability to combine collapse with another component (e.g. tooltip).

I'd propose relaxing the descendants selector to use a contains ('[data-toggle!="collapse"]), contains prefix ('[data-toggle*="collapse"]), or contains word ('[data-toggle~="collapse"]) selector. Although, I would venture to say that the contains word selector would be best suited in this case.