User selection persists

[adrn]

Currently a bug -- I don't think this is what we want. When the user selects something, then clicks a state, it should reset the user selection first.

[ernewton]

User selection persists within the range defined by the current state. If you select 0.5 to 0.6, and go to a state that is supposed to show 0.8 to 0.9, it won't show anything. But if you select 0.5 to 0.6 and go to a range that is supposed to show 0.55 to 0.7, it will show 0.55 to 0.6. Which is a long way of saying... it shows the union of the range the user selected range and the state range.