In Clarion6 (and earlier?) you could press F12 and open a “Property List” to view all the elements of the current window.
In C7/8/10+ this appears to be superseded by the Tab Order Assistant. Accessible from the View menu or by pressing F9 whilst in the window designer:
You may notice that it is not quite the same as the C6 version, for example the menu items are not listed but I think it is about as good as you will get.
Menus have their own editor now anyway so its not really an valid comparison. Not everything is the same 
Here is the menu editor for example:
