impose a cap on zoom level for current location (bug 38983)

In certain areas where there are no monuments e.g. Australia we are
searching an extremely large number of zoom levels.

This caps the zoom levels we try to just 5 zoom levels (we might tweak
this later) which in most cases gives a city view.

assets/www/js/app.js

@@ -534,17 +534,19 @@ require( [ 'jquery', 'l10n', 'geo', 'api', 'templates', 'monuments', 'monument',
 
 	function showMonumentsForPosition( latitude, longitude, zoomLevel ) {
 		var d, map, bounds, nw, se,
+			maxZoom,
 			pos = { lat: latitude, lon: longitude };
 
 		map = geo.getMap();
-		zoomLevel = zoomLevel || map.getMaxZoom();
+		maxZoom = map.getMaxZoom();
+		zoomLevel = zoomLevel || maxZoom;
 		geo.setCenterAndZoom( pos, zoomLevel, true );
 		bounds = map.getBounds();
 		nw = bounds.getNorthWest();
 		se = bounds.getSouthEast();
 		d = monuments.getInBoundingBox( nw.lng, se.lat, se.lng, nw.lat ).
 			done( function( monuments ) {
-				if( monuments.length === 0 ) {
+				if( monuments.length === 0 && zoomLevel > maxZoom - 5 ) {
 					showMonumentsForPosition( latitude, longitude, zoomLevel - 1 );
 				} else {
 					showMonumentsMap( monuments );
@@ -738,6 +740,7 @@ require( [ 'jquery', 'l10n', 'geo', 'api', 'templates', 'monuments', 'monument',
 		app: {
 			clearHistory: clearHistory,
 			goBack: goBack,
+			showMonumentsForPosition: showMonumentsForPosition,
 			showMonumentsList: showMonumentsList,
 			resolveImageThumbnail: resolveImageThumbnail,
 			showPage: showPage