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For some windows I desire the NSWindowCollectionBehaviorMoveToActiveSpace behavior when the application is active, e.g. calling up a find dialog should show that dialog on the active space, even if it was previously used on another space.

But when moving focus to my application I do not want this behavior. For example if we leave the application with the find window as key, switch space, and bring back focus to my app (command-tab) then rather than move back to the space where the find dialog was last used, the find dialog is moved to the active space.

For this reason I observe the NSApplicationDidBecomeActiveNotification/NSApplicationDidResignActiveNotification notifications and run this code:

	- (void)applicationDidBecomeActive:(NSNotification*)aNotification
	{
		self.window.collectionBehavior |= NSWindowCollectionBehaviorMoveToActiveSpace;
	}

	- (void)applicationDidResignActive:(NSNotification*)aNotification
	{
		self.window.collectionBehavior &= ~NSWindowCollectionBehaviorMoveToActiveSpace;
	}

Starting with 10.11 this no longer works.

Steps to Reproduce:
1. Add the code from the description to an app.
2. Open the window on which the code works.
3. Switch to another application and space.
4. Command-tab back to the application.

Expected Results:
We should switch back to the space the application was last used in.

Actual Results:
The window is brought to our current space.

Notes:
If we change the collection behavior asynchronously then it works on 10.11, for example:

	- (void)applicationDidBecomeActive:(NSNotification*)aNotification
	{
		dispatch_async(dispatch_get_main_queue(), ^{
			self.window.collectionBehavior |= NSWindowCollectionBehaviorMoveToActiveSpace;
		});
	}

	- (void)applicationDidResignActive:(NSNotification*)aNotification
	{
		dispatch_async(dispatch_get_main_queue(), ^{
			self.window.collectionBehavior &= ~NSWindowCollectionBehaviorMoveToActiveSpace;
		});
	}