bpo-43534: Make dialogs in turtle.textinput() and turtle.numinput() transitient again (GH-24923)

diff --git a/Lib/turtle.py b/Lib/turtle.py
index 81cfcfe..11429a6 100644
--- a/Lib/turtle.py
+++ b/Lib/turtle.py
@@ -826,7 +826,7 @@ def textinput(self, title, prompt):
         >>> screen.textinput("NIM", "Name of first player:")
 
         """
-        return simpledialog.askstring(title, prompt)
+        return simpledialog.askstring(title, prompt, parent=self.cv)
 
     def numinput(self, title, prompt, default=None, minval=None, maxval=None):
         """Pop up a dialog window for input of a number.
@@ -847,7 +847,8 @@ def numinput(self, title, prompt, default=None, minval=None, maxval=None):
 
         """
         return simpledialog.askfloat(title, prompt, initialvalue=default,
-                                     minvalue=minval, maxvalue=maxval)
+                                     minvalue=minval, maxvalue=maxval,
+                                     parent=self.cv)
 
 
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