Alt + Keycode shortcuts no longer work in Editor

As of 5.4.0b3 any shortcut with a single Alt key modifier now opens the file menu with the equivalent first character. I think this typical of other programs, but not when a shortcut has been defined?

Code (csharp):

1.  
2. using UnityEngine;
3. using UnityEditor;
4.  
5. public class SayHello : Editor
6. {
7.     // Alt+H works in Unity 5.3.1, does not in 5.4.0b3
8.     // In 5.4.0b3, alt-h opens the Help menu.
9.  
10.     [MenuItem("Tools/Say Hello &h")]
11.     static void MenuHello()
12.     {
13.         Debug.Log("hello!");
14.     }
15. }
16.  

 

Definitely. Case 766786 submitted against 5.4.0b4.