title: wpf menu tab stop strange behaviour
body: <p>I've just been cleaning up my program and I was checking how the tabs worked when I came across this very strange behaviour. My Main menu items were included in the tab order. Thinking that was strange I set their IsTabStop property to false, and ran it again.</p>
  
  <p>They were no longer in my tab order but when I pressed ALT to activate the menu I could no longer use the arrow keys to navigate between the items.</p>
  
  <p>Is there a way around this and make the menu act like a normal old school menu?</p>