Feature request: map search

[rsimon]

As a future feature in the AllMaps Editor, it would be fantastic to have a placename search box. The box could send a query to a lookup service like nominatim and then center the map accordingly. A nice-to-have, rather than essential feature for sure, but would be really useful for georeferencing tasks.

[emilyrbowe]

+1 from the perspective of @itspangler and myself!