title: Resize Tkinter Listbox widget when window resizes
body: <p>I'm new to Tkinter, and I've got a <code>Listbox</code> widget that I'd like to automatically-resize when changing the main window's size. </p>
  
  <p>Essentially I would like to have a fluid height/width Listbox. If someone can point me to some documentation or provide a bit a code / insight, I'd appreciate it.</p>