bpo-33987: IDLE - use ttk Frame for ttk widgets (GH-11395)

(cherry picked from commit aff0adabf3ace62073076f4ce875ff568f2d3180)

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
diff --git a/Lib/idlelib/searchbase.py b/Lib/idlelib/searchbase.py
index 348db66..f0e3d6f 100644
--- a/Lib/idlelib/searchbase.py
+++ b/Lib/idlelib/searchbase.py
@@ -1,7 +1,7 @@
 '''Define SearchDialogBase used by Search, Replace, and Grep dialogs.'''
 
-from tkinter import Toplevel, Frame
-from tkinter.ttk import Entry, Label, Button, Checkbutton, Radiobutton
+from tkinter import Toplevel
+from tkinter.ttk import Frame, Entry, Label, Button, Checkbutton, Radiobutton
 
 
 class SearchDialogBase: