Adds a fixture generator for the NeatlineMapSubscribeSelectVector suite.
Adds test for record focusing when neither a focus nor a zoom is set.
Refactors the focusByModel() method on the map view so that it can apply custom focuses/zooms independent of whether the other is defined.
Makes the focus tests clearer.
Adds 'Use Current' buttons on the 'Default Focus' and 'Default Zoom' inputs.