Workaround for terminate: warning when using cibs.

Reviewed by me.

AppKit/CPApplication.j

@@ -293,6 +293,11 @@ CPRunContinuesResponse  = -1002;
     _finishedLaunching = YES;
 }
 
+- (void)terminate:(id)aSender
+{
+    [CPPlatform terminateApplication];
+}
+
 /*!
     Calls \c -finishLaunching method which results in starting
     the main event loop.
@@ -407,7 +412,7 @@ CPRunContinuesResponse  = -1002;
 {
     if ([_mainMenu performKeyEquivalent:anEvent])
         return YES;
-    
+
     return NO;
 }
 
@@ -492,7 +497,13 @@ CPRunContinuesResponse  = -1002;
 */
 - (void)setMainMenu:(CPMenu)aMenu
 {
+    if (_mainMenu === aMenu)
+        return;
+
     _mainMenu = aMenu;
+
+    if ([CPPlatform supportsNativeMainMenu])
+        window.cpSetMainMenu(_mainMenu);
 }
 
 - (void)orderFrontColorPanel:(id)aSender

AppKit/CPMenu.j

@@ -91,7 +91,10 @@ var _CPMenuBarVisible               = NO,
         return;
     
     _CPMenuBarVisible = menuBarShouldBeVisible;
-    
+
+    if ([CPPlatform supportsNativeMainMenu])
+        return;
+
     if (menuBarShouldBeVisible)
     {
         if (!_CPMenuBarSharedWindow)

AppKit/Platform/CPPlatform.j

@@ -34,4 +34,15 @@
     return CPFeatureIsCompatible(CPHTMLDragAndDropFeature);
 }
 
++ (BOOL)supportsNativeMainMenu
+{
+    return (typeof window["cpSetMainMenu"] === "function");
+}
+
++ (void)terminateApplication
+{
+    if (typeof window["cpTerminate"] === "function")
+        window.cpTerminate();
+}
+
 @end