bpo-34120: fix IDLE freezing after closing dialogs (GH-8603)


Added missing .grab_release() calls to all places where we call .grab_set().
(cherry picked from commit 10ea9409ceb5da83cb380b610750551e26561044)

Co-authored-by: Tal Einat <taleinat+github@gmail.com>
diff --git a/Lib/idlelib/configdialog.py b/Lib/idlelib/configdialog.py
index c783238..e682ec0 100644
--- a/Lib/idlelib/configdialog.py
+++ b/Lib/idlelib/configdialog.py
@@ -191,6 +191,7 @@
     def destroy(self):
         global font_sample_text
         font_sample_text = self.fontpage.font_sample.get('1.0', 'end')
+        self.grab_release()
         super().destroy()
 
     def help(self):