Stop emitting the (temporarily ?) deprecated Quit message at the endof a game and factorize the function to go back to main menu instead

js/GUI/Screen/Game.js

@@ -38,13 +38,15 @@ function init(gameID) {
 	);
 }
 
+function backToMain() {
+	window.location = '..';
+}
+
 function fail(errorCode) {
 	return function(f) {
 		Screen.dialog({
 			text: I18n.get(errorCode),
-			answers: [
-				{label: 'backToMain', action: function() {window.location = '..';}}
-			]
+			answers: [{label: 'backToMain', action: backToMain}]
 		});
 	}
 }
@@ -160,14 +162,7 @@ function gameEnd(o, f) {
   }
   Screen.dialog({
     text: I18n.get(Session.is(winner) ? 'won' : 'lost'),
-    answers: [{
-      label: 'endGame',
-      action: function() {
-        Messaging.send({tag: "Quit"});
-        Screen.select('reception');
-        f();
-      }
-    }]
+    answers: [{label: 'endGame', action: backToMain}]
   });
 }