Places App: Enter to teleport

This PR add the possibility to press "Enter" to initiate a teleportation from the value in the search/address bar of the Places App.
(In addition to the current teleport button)
This is a more intuitive behaviour since everyone is used to this in the web browsers.

scripts/system/places/places.html

@@ -669,6 +669,12 @@
                 generateContent();
             }
 
+            document.addEventListener("keyup", function(event) {
+                if (event.keyCode === 13) {
+                    teleportUsingAddressBarValue(document.getElementById("search").value);
+                }
+            });
+
             function teleportUsingAddressBarValue(url) {
                 var finalizedUrl = url;
                 if (url.substr(0, 7).toLocaleLowerCase() !== "http://" &&