title: Align Button To The center Of the window using pysimplegui
body: <p>In my application am trying to place my button,text and input at the center of the window.I am using <strong>PySimpleGUI</strong> for designing buttons.For aligning to the center i used <code>justification='center'</code> attribute on my code.But still it is not fitting to the center of the window.</p>
  
  <p>The code am working with is</p>
  
  <pre><code>import PySimpleGUI as sg
  from tkinter import * 
  sg.theme('DarkAmber')  
  layout = [ 
          [sg.Text('Enter the value',justification='center')],
          [sg.Input(justification='center')],
          [sg.Button('Enter','center')]
       ]
  
  
    window = sg.Window('My new window', layout, size=(500,300), grab_anywhere=True)
  
   while True:
  event, values = window.read()   # Read the event that happened and the values dictionary
  print(event, values)
  if event == sg.WIN_CLOSED or event == 'Exit':     # If user closed window with X or if user clicked "Exit" button then exit
      break
  if event == 'Button':
    print('You pressed the button')
  window.close()
  </code></pre>
  
  <p>The above code outputs 
  <a href="https://i.stack.imgur.com/FVqg5.png" rel="noreferrer"><img src="https://i.stack.imgur.com/FVqg5.png" alt="enter image description here"></a> 
  How can i make the text,button and input to the center of the window?</p>