QA section

Here are a few questions to reflect upon:

• What's the difference between the Checkbutton menu item and the Radio button menu item? 
• What's the Cascade menu button used for? 
• Identify different kinds of Toplevel window. 
• List the different types of filedialogs and message boxes available in Tkinter. 
• We used the pack geometry manager to build this text editor. Could we have built this using the grid geometry manager? How would the grid geometry manager fare against pack?
• How can we trigger events without an external stimulus in Tkinter?
• What are accelerator options in menu items?
• What is a transient window?