add location picker so set receiver location

htdocs/settings.js

@@ -0,0 +1,23 @@
+$(function(){
+    $(".map-input").each(function(el) {
+        var $el = $(this);
+        var field_id = $el.attr("for");
+        var $lat = $('#' + field_id + '-lat');
+        var $lon = $('#' + field_id + '-lon');
+        $.getScript("https://maps.googleapis.com/maps/api/js?key=" + $el.data("key")).done(function(){
+            $el.css("height", "200px");
+            var lp = new locationPicker($el.get(0), {
+                lat: parseFloat($lat.val()),
+                lng: parseFloat($lon.val())
+            }, {
+                zoom: 7
+            });
+
+            google.maps.event.addListener(lp.map, 'idle', function(event){
+                var pos = lp.getMarkerPosition();
+                $lat.val(pos.lat);
+                $lon.val(pos.lng);
+            });
+        });
+    })
+});