Pycharm hangs when close application

I'm pretty new to python so please bare with me when it comes to terminology.  

I'm playing around with PyCharm community and Python 3.6, creating a silly little application just to get the feel of the language. Anyway... So I go to close the program with root.quit from a menu link and it hangs pycharm until I manually click the red X on the application gui.  Intestingly enough it works fine from command line, closes with no hang.

PyCharm Information:

PyCharm 2018.1.1 (Community Edition)
Build #PC-181.4445.76, built on April 9, 2018
JRE: 1.8.0_152-release-1136-b27 amd64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
Windows 10 10.0

Actual Code, pretty simple stuff:

# !/usr/bin/python3
from tkinter import *


def donothing():
    filewin = Toplevel(root)
    button = Button(filewin, text="Do nothing button")
    button.pack()


root = Tk()
root.title("Celltron Labor")
root.geometry('1024x768')

menubar = Menu(root)
filemenu = Menu(menubar, tearoff=0)
filemenu.add_command(label="New", command=donothing)
filemenu.add_command(label="Open", command=donothing)
filemenu.add_command(label="Save", command=donothing)
filemenu.add_command(label="Save as...", command=donothing)
filemenu.add_command(label="Close", command=donothing)

filemenu.add_separator()

filemenu.add_command(label="Exit", command=root.quit)
menubar.add_cascade(label="File", menu=filemenu)
editmenu = Menu(menubar, tearoff=0)
editmenu.add_command(label="Undo", command=donothing)

editmenu.add_separator()

editmenu.add_command(label="Cut", command=donothing)
editmenu.add_command(label="Copy", command=donothing)
editmenu.add_command(label="Paste", command=donothing)
editmenu.add_command(label="Delete", command=donothing)
editmenu.add_command(label="Select All", command=donothing)

menubar.add_cascade(label="Edit", menu=editmenu)
helpmenu = Menu(menubar, tearoff=0)
helpmenu.add_command(label="Help Index", command=donothing)
helpmenu.add_command(label="About...", command=donothing)
menubar.add_cascade(label="Help", menu=helpmenu)

root.config(menu=menubar)
root.mainloop()

Any thoughts?