title: NSMenuItem with custom view does not update
body: <p>I have a NSMenuItem with a custom view. However, when I want to update the first row in the menu it add the content as it is in the xib file, not as I set it.</p>
  
  <p>My code: 
  AppDelegate.m:</p>
  
  <pre><code>- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
  {
      _helper = [[Helper alloc] init];
  
      statusItem = [[NSStatusBar systemStatusBar] statusItemWithLength:NSVariableStatusItemLength];
      [statusItem setMenu:self.statusMenu];
      [statusItem setTitle:@"GravAccount"];
      [statusItem setHighlightMode:YES];
  
      _gravatarLoader = [[GravatarLoader alloc] initWithTarget:self andHandle:@selector(setGravatarImage:)];
  
      // Get email address
      _email = [_helper getEmailAddress];
  
      if (_email != nil)
      {
          [_gravatarLoader loadEmail:_email withSize:50.0];
      }
  }
  
  - (void)setGravatarImage:(NSImage*)image
  {
      NSLog(@"Image loaded!");
  
      GravatarMenuItem *menuItem = [[GravatarMenuItem alloc] initWithNibName:@"GravatarMenuItem" bundle:nil];
      [menuItem.label setTitle:_email];
      [menuItem.imageView setImage:image];
  
      NSLog(@"Email: %@", _email);
  
      NSMenuItem *item = [[NSMenuItem alloc] initWithTitle:@"" action:nil keyEquivalent:@""];
      [item setView:menuItem.view];
  
      [self.statusMenu removeItemAtIndex:0];
      [self.statusMenu insertItem:item atIndex:0];
  }
  </code></pre>
  
  <p>GravatarMenuItem.h:</p>
  
  <pre><code>#import &lt;Cocoa/Cocoa.h&gt;
  
  @interface GravatarMenuItem : NSViewController
  
  @property (nonatomic, strong) IBOutlet NSImageView *imageView;
  @property (nonatomic, strong) IBOutlet NSTextFieldCell *label;
  
  @end
  </code></pre>
  
  <p>The outlets are linked in the XIB file on the file's owner.</p>
  
  <p>This is the result:
  Log:</p>
  
  <pre><code>2012-03-09 16:57:24.314 appName[51158:403] Image loaded!
  2012-03-09 16:57:24.316 appName[51158:403] Email: Paul@******.se
  </code></pre>
  
  <p>Result:<br/>
  <img src="https://i.stack.imgur.com/zTOYX.png" alt="Result"></p>