menu.item disabled prop should still allow mouseenter/leave

[bay-jacewhitten]

The menu.item disabled prop should still allow mouseenter/leave, while disabling click and keydown. Alternatively, allow onClick or href prop to be passed in to override the components href/onclick prop.

When using something like rc-toolip inside the MenuItem as a child component, it will not trigger due to no event bubbling from mouse events.

Thanks!