Apparent caching of old name in balloons

[mackerski]

To reproduce: Identify a POI on the map, tap it, note the name appearing the in balloon. Now go into edit mode and change the name (currently by deleting and readding the "name" tag). Save the changes.

Allow enough time for Overpass to update, then refresh the POIs on the map. It felt like I had to change zoom levels to achieve this. Tap again on the POI and the name will be seen to be unchanged in the balloon. Entering edit mode will show the updated name, however.