Fix OS X request focus

notify_user.diff

diff --git a/src/SFML/Window/OSX/SFViewController.mm b/src/SFML/Window/OSX/SFViewController.mm
index 56c1b89..ee7f7eb 100644
--- a/src/SFML/Window/OSX/SFViewController.mm
+++ b/src/SFML/Window/OSX/SFViewController.mm
@@ -192,6 +192,9 @@
     // The user has to make sure events are forwarded to the view
     // with the usual responder chain.
     [[m_view window] makeKeyAndOrderFront:nil];
+
+    // In case the app is not active, make it's dock icon bounce for one sec
+    [NSApp requestUserAttention:NSInformationalRequest];
 }
 
 
diff --git a/src/SFML/Window/OSX/SFWindowController.mm b/src/SFML/Window/OSX/SFWindowController.mm
index 3b8f4b2..a28282b 100644
--- a/src/SFML/Window/OSX/SFWindowController.mm
+++ b/src/SFML/Window/OSX/SFWindowController.mm
@@ -453,6 +453,9 @@
 -(void)requestFocus
 {
     [m_window makeKeyAndOrderFront:nil];
+
+    // In case the app is not active, make it's dock icon bounce for one sec
+    [NSApp requestUserAttention:NSInformationalRequest];
 }