Nation selection screen

[DainialPadraig]

If a player accepts a mission, a list of nations to scavenge from should be displayed. (The map is too small on mobile to select smaller nations, like Japan.)

[DainialPadraig]

When selecting a nation for scavenging, the nations available should be based on the type of plastic the mission tasking is asking for.

For example, let's say the mission is to collect 100,000 PET bottles. The database should be accessed to determine the nations near the top of the data for recovered plastic bottles. (Determining how many of those are PET vs HDPE is a separate issue we may choose to address or not.) The selected nations should be highlighted on the map and made available to select on the menu window. The number of nations should be determined, but six seems like a good starting point.