Move key JS to application bundle

app/assets/javascripts/key.js

@@ -0,0 +1,26 @@
+$(document).ready(function () {
+  $("#open_map_key").click(function (e) {
+    var url = $(this).attr('href'),
+        title = $(this).text();
+
+    function updateMapKey() {
+      $("#sidebar_content").load(url, {
+        layer: map.baseLayer.keyid,
+        zoom: map.getZoom()
+      });
+    }
+
+    updateMapKey();
+    openSidebar({ title: title });
+
+    $("#sidebar").one("closed", function () {
+      map.events.unregister("zoomend", map, updateMapKey);
+      map.events.unregister("changelayer", map, updateMapKey);
+    });
+
+    map.events.register("zoomend", map, updateMapKey);
+    map.events.register("changelayer", map, updateMapKey);
+
+    e.preventDefault();
+  });
+});