Show inherited members in API reference

Well Look like godot engine docs does not have anything common with reality.
Why i think so.
Simple example :

```
func _input(event):
if event is InputEventMouseMotion:
print("Mouse Motion at: ", event.position)
```

As you see after VERY long search in docs method **_input** inherited from **Node** class
void _input ( InputEvent event ) virtual
so now we know that variable _event_ is class InputEvent.
So now we go to description of class **InputEvent** to find description for property **event.position** and nothing written in documentation about it.
Ok lets try to search in parent classes which we see in docs for **InputEvent**
> Inherits: Resource < Reference < Object

None of such classes have property **position**. Ok. Lets try to search in classes inherited by.
After long research you suddenly find that position property described in class **InputEventMouseMotion** but in description for **InputEvent** you not see that InputEvent was inherited by InputEventMouse. Such problems in documentation create a lot of confuses.
This is only one simple example . But such situation is almost everywhere.