Fixed appending circle/ellipse to wxGraphicsPath with Direct2D renderer.

Circle/ellipse should be appended as a closed sub-path and the current point after the operation should be moved to "the rightmost point" of the figure ((x+r,y) and (x+w,y+h/2) respectively).

See #17520

interface/wx/graphics.h

@@ -51,6 +51,7 @@ public:
     /**
         Appends a circle around (@a x,@a y) with radius @a r as a new closed
         subpath.
+        After this call the current point will be at (@a x+@a r, @a y).
     */
     virtual void AddCircle(wxDouble x, wxDouble y, wxDouble r);
 
@@ -70,7 +71,9 @@ public:
                          const wxPoint2DDouble& e);
 
     /**
-        Appends an ellipse fitting into the passed in rectangle.
+        Appends an ellipse fitting into the passed in rectangle as a new
+        closed subpath.
+        After this call the current point will be at (@a x+@a w, @a y+@a h/2).
     */
     virtual void AddEllipse(wxDouble x, wxDouble y, wxDouble w, wxDouble h);