Hey FrankBKK,
Another way to access either the Menu editor or the Action List editor is to right click on the object that is listed on the object inspector when you have it on Tree View mode.
This does not require you to switch to Form View and you can access it when the Code View is active.
Granted, not a short cut nor a Toolbar button, but since you can have multiple Main Menus and Action Lists on the same form, would it be practical to have one button created for each instance of these objects, or would it make more sense to have the default context menu approach?
Hope this helps!
Cheers,
Gus