Fix integration specs

Regarding the removal of local headless specs...

"This was a good exercise, but in the end, it wasn't worth the time savings and
resulted in messy conditional code and confusing discrepancies between local and
CI. A better exercise would be to actually refactor the extremely slow drag and
drop specs to run faster. I'll make a story for that..."

Not to mention local integration specs haven't been working for a while now and nobody ever ran them...