Draft: fix issue with undo (#8267)

src/Mod/Draft/draftobjects/circle.py

@@ -64,9 +64,13 @@ class Circle(DraftObject):
 
         obj.MakeFace = utils.get_param("fillmode", True)
 
-
     def execute(self, obj):
         """This method is run when the object is created or recomputed."""
+        if self.props_changed_placement_only():
+            obj.positionBySupport()
+            self.props_changed_clear()
+            return
+
         import Part
 
         plm = obj.Placement
@@ -88,8 +92,11 @@ class Circle(DraftObject):
             obj.Area = shape.Area
 
         obj.Placement = plm
-
         obj.positionBySupport()
+        self.props_changed_clear()
+
+    def onChanged(self, obj, prop):
+        self.props_changed_store(prop)
 
 
 # Alias for compatibility with v0.18 and earlier