Fix removal of idle interactions on pointerup
Fix removal of idle interactions on pointerup

A missing `break` in a for loop led to multiple interactions sometimes
being removed.

Closes #251

marian-r/interact.js,bios21/interact.js,taye/interact.js,bios21/interact.js,adamgruber/interact.js,taye/interact.js,Endika/interact.js,Endika/interact.js,adamgruber/interact.js,taye/interact.js,mcanthony/interact.js,marian-r/interact.js,mcanthony/interact.js