Meant to break this up, but didn't. Sue me.

Location / Place / Geolocation
==============================
- Fixed selecting a saved location.
- Made the current location and the preferred location distinct concepts.
- Made both said locations belong to `app`.

Android
=======
- Made android back button.
- Made android back button work.
- Styled popups.

General
=======
- About probably shouldn't be a popup. Removed it from Main.
- Probably some other things?