Implement FavoritesAdapter.getTopFavorites

This is the method intended for use in the main UI.
Show top favorite locations in main UI
Swap lat/lon in getTopFavorites query

It seems slightly clearer to keep the order of the columns the same as
the constructor arguments.
Merge branch 'favorites-list' into algorithm
Initial implementation of DatabaseResetter
WIP non-overlapping algorithm

Definitely better, but still leaves multiple nearby favorites sometimes