affected by a tk regression. Initial patch by Mark Roseman.
scrollbar.config(command=listbox.yview)
scrollbar.pack(side=RIGHT, fill=Y)
listbox.pack(side=LEFT, fill=BOTH, expand=True)
+ acw.lift() # work around bug in Tk 8.5.18+ (issue #24570)
# Initialize the listbox selection
self.listbox.select_set(self._binary_search(self.start))
background="#ffffe0", relief=SOLID, borderwidth=1,
font = self.widget['font'])
self.label.pack()
+ tw.lift() # work around bug in Tk 8.5.18+ (issue #24570)
self.checkhideid = self.widget.bind(CHECKHIDE_VIRTUAL_EVENT_NAME,
self.checkhide_event)