Maps service for GNOME Online Accounts
"Maps" feature is commented out in accounts-which-application.page, because "Not sure what this does". Well, it doesn't seem to work currently. It "supports" Facebook and Foursquare back-ends, but:
- Facebook doesn't seem to work. Error message is printed of missing propriety, and check-in simply does not work.
- Foursquare fails to link to GNOME Online Accounts.
Do we want to make anything of this, like update the reason to disable it from the documentation?