Open Radar

 
Summary:
When using an NSOpenPanel to select a directory with the view set to Cover Flow, double clicking a folder will immediately select that folder and close the panel

Steps to Reproduce:
1. Create a new project in xcode
2. Add an openFolder method to the app delegate as follows:
- (void)openFolder:(id)sender {
    NSOpenPanel *openPanel = [NSOpenPanel openPanel];
    [openPanel setCanChooseFiles:NO];
    [openPanel setCanChooseDirectories:YES];
    [openPanel beginSheetModalForWindow:self.window completionHandler:^(NSInteger result) {
        NSLog( @"%@", [openPanel URLs]);
    }];
}
3. Hook up a menu item
4. Run and select the menu item
5. Set the view to Cover Flow
6. Try to navigate into a folder by double clicking

Expected Results:
The Finder window should display the contents of the folder

Actual Results:
The open panel closes and returns the folder that was clicked on

Regression:
If the view is set to Icons, List or Columns, double clicking the folder opens the folder as expected.

Notes:
Provide additional information, such as references to related problems, workarounds and relevant attachments.