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

diff --git a/Lib/idlelib/configdialog.py b/Lib/idlelib/configdialog.py
index 229dc89..5fdaf82 100644
--- a/Lib/idlelib/configdialog.py
+++ b/Lib/idlelib/configdialog.py
@@ -14,7 +14,7 @@
                      TOP, BOTTOM, RIGHT, LEFT, SOLID, GROOVE,
                      NONE, BOTH, X, Y, W, E, EW, NS, NSEW, NW,
                      HORIZONTAL, VERTICAL, ANCHOR, ACTIVE, END)
-from tkinter.ttk import (Button, Checkbutton, Entry, Frame, Label, LabelFrame,
+from tkinter.ttk import (Frame, LabelFrame, Button, Checkbutton, Entry, Label,
                          OptionMenu, Notebook, Radiobutton, Scrollbar, Style)
 import tkinter.colorchooser as tkColorChooser
 import tkinter.font as tkFont