After switching tree maps, using the back button from the main tab layout screen returns the user to the previous tree map

[maurizi]

This is a regression, the behavior before was that the app would always exit from the main tab layout screen on back press.

[RobinIsTheBird]

The solution I propose to #297 (Navigating up from filter display repositions the camera), withsingleTop + onNewIntent, would probably fix this, too.