z and IN_BOUNDARY compete for primacy

[RobinIsTheBird]

• Choose a named boundary from the Location Search box pull-down.
• The map zooms/pans to fit the boundary to the view as expected
• Manually pan and zoom
• Refresh the page

Usually the page refresh will pan/zoom to fit the boundary to the view, but occasionally it will remain zoomed.

Unclear why, but my guess is that z and q are parsed into a dict and processed in an indeterminate order, so the last one wins.

We need to

• decide which way we want it to be, and then
• make it determinate

[jwalgran]

I removed the design label because we reserve it for things that are primarily tasks for the design team.