Prevent Cocoa from sending us open file events from command line args

We process command line args ourselves, thank you very much.

glfw/cocoa_init.m

@@ -546,8 +546,12 @@ int _glfwPlatformInit(void)
     if (_glfw.hints.init.ns.chdir)
         changeToResourcesDirectory();
 
-    // Press and Hold prevents some keys from emitting repeated characters
-    NSDictionary* defaults = @{@"ApplePressAndHoldEnabled":@NO};
+    NSDictionary* defaults = @{
+        // Press and Hold prevents some keys from emitting repeated characters
+        @"ApplePressAndHoldEnabled": @NO,
+        // Dont generate openFile events from command line arguments
+        @"NSTreatUnknownArgumentsAsOpen": @"NO",
+    };
     [[NSUserDefaults standardUserDefaults] registerDefaults:defaults];
 
     [[NSNotificationCenter defaultCenter]