Add option to download a local copy of the map

[analpi]

I've noticed that every time I close and re-open Tice, it re-downloads the map of the area around me. It would be nice to be able to download and store the map on my device so it doesn't use as much data. Perhaps it could fetch and update the map only when connected to wifi?

[FabioTacke]

Thanks for the suggestion. At least in the F-Droid flavor this feature should be possible to add. Caching map tiles is already integrated but the cache is being flushed on an app relaunch.

[Quantum-Future]

It would be good if the cache is not flushed automatically, but instead provide an option to erase the downloaded map tiles.