[ Bug ] "Modal" windows can't be minimized

[PySimpleGUI]

Type of Issues (Enhancement, Error, Bug, Question)

Bug

Operating System

Windows 10

Python version

3.6

PySimpleGUI Port and Version

Ports = tkinter
PySimpleGUI Version: 4.29.0.16

tkinter version:

Description of Problem / Question / Details

Code To Duplicate

This problem is demonstrable by using simple popups, but to make it clearer that it's the modal parameter in the call to Window that is the root cause, I chose to show an entire window's creation.

For a popups, you could simply call popup('Anything') to show the problem and popup('Anything', modal=False) to show minimize capability is restored.

import PySimpleGUI as sg

layout = [  [sg.Text('My Window will not minimize'+sg.ver)],
            [sg.Button('Go'), sg.Button('Exit')]  ]

window = sg.Window('Window Title', layout, modal=True)

while True:             # Event Loop
    event, values = window.read()
    print(event, values)
    if event in (sg.WIN_CLOSED, 'Exit'):
        break
window.close()