Offline maps / Pre-Download Map Tiles

🚧 THIS IS A TICKET MIGRATED FROM UPVOTY. The original ticket and comments will be available for a limited time over at:
https://abrp.upvoty.com/b/request-a-feature/offline-maps/
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I used ABRP to plan an EV trip to France BUT I used Google maps for the navigation because I was able to download maps of the UK and France for cases where there are spotty mobile connections. I should be able to just use ABRP and have offline maps there