Fix: ensure geopicker is loaded for non-nested setgeopoint actions

[eyelidlessness]

This addresses discrepancies in the DOM representation similar to those found in #903. I'm not totally confident this selector is safe, but it handles all of the cases I was able to identify, without reintroducing the duplicate-widget bug fixed in #896.

Edit: branched from #903 because the form under test depends on that fix.