Added application activation.

Reviewed by me.

AppKit/CPApplication.j

@@ -298,6 +298,11 @@ CPRunContinuesResponse  = -1002;
     [CPPlatform terminateApplication];
 }
 
+- (void)activateIgnoringOtherApps:(BOOL)shouldIgnoreOtherApps
+{
+    [CPPlatform activateIgnoringOtherApps:shouldIgnoreOtherApps];
+}
+
 /*!
     Calls \c -finishLaunching method which results in starting
     the main event loop.

AppKit/CPWindow/CPWindow.j

@@ -1264,6 +1264,8 @@ CPTexturedBackgroundWindowMask
                                     if (_leftMouseDownView != _firstResponder && [_leftMouseDownView acceptsFirstResponder])
                                         [self makeFirstResponder:_leftMouseDownView];
 
+                                    [CPApp activateIgnoringOtherApps:YES];
+
                                     var theWindow = [anEvent window];
 
                                     if ([theWindow isKeyWindow] || [theWindow becomesKeyOnlyIfNeeded])

AppKit/Platform/CPPlatform.j

@@ -45,4 +45,12 @@
         window.cpTerminate();
 }
 
++ (void)activateIgnoringOtherApps:(BOOL)shouldIgnoreOtherApps
+{
+#if PLATFORM(DOM)
+    if (typeof window["cpActivateIgnoringOtherApps"] === "function")
+        window.cpActivateIgnoringOtherApps(!!shouldIgnoreOtherApps);
+#endif
+}
+
 @end