fix offline geolocate

[emphasize]

As discussed in chat. (TLDR: Reverse searched location dict is more complete than with name search)

NOTE: the resulting location dict from the reverse search has an address key!

original fix

# if no addresstags are present for the location an empty list is sent instead of a dict
if not details.get("addresstags"):
     details["addresstags"] = dict()

closes #31