Bug 1022985 - SmartCollection is not placed where you tap

https://bugzilla.mozilla.org/show_bug.cgi?id=1022985

Gaia-try: https://tbpl.mozilla.org/?tree=Gaia-Try&rev=a4a4cdabaca1
It works for multiple yeah, but no guarantee for ordering which is fine I think. You can't currently add collections outside of the homescreen, but I think a bug was filed to allow them from the search app. I think resetting it on the activity return should be fine.