title: Tkinter, treeview doesn't resize
body: <p>How can I make the treeview resize when I resize the window in height ?
  I tried to set <code>sticky="sn"</code>, I tried to pack the treeview with <code>fill='y'</code>, but nothing worked.</p>
  
  <pre><code>import tkinter as tk
  from tkinter.ttk import Treeview
  
  root = tk.Tk()
  
  f1 = tk.Frame(root)
  f2 = tk.Frame(root)
  
  f1.grid(column=0, row=0, sticky="s")
  f2.grid(column=1, row=0, sticky="n")
  root.rowconfigure(0, weight=1)
  
  Treeview(f1).pack()
  tk.Button(f2, text="DAT BUTTON IS IN F2").pack()
  tk.Button(f2, text="DAT BUTTON IS IN F2").pack()
  tk.Button(f2, text="DAT BUTTON IS IN F2").pack()
  
  root.mainloop()
  </code></pre>