Enable "zoom to max" button on pan control

The pan control provides a button to zoom to max extent, which doesn't
seem to work if there is no restricted extent on the map.  I added a
generous restriction that shouldn't interfere with panning on the map
that still zooms out to the DC area
Permission levels appear in ascending order

Highest restrictions at the bottom of the list
Make file selector control wider

A request from the client
Enable property events on dialog

Fixes a bug which was using the wrong property to check for property
event details