SetFullScreen require sleep some time to take effect

[xfaris]

Checklist

• I have searched the issue tracker for open issues that relate to the same problem, before opening a new one.
• This issue only relates to a single bug. I will open new issues for any other problems.

Describe the bug

SetFullScreen require sleep some time to take effect; otherwise, it won't go fullscreen and the window's position will be incorrect.

How to reproduce

I see some code in internal/driver/glfw/window.go

if w.fullScreen { // this does not work if called before viewport.Show()
go func() {
time.Sleep(time.Millisecond * 100)
w.SetFullScreen(true)
}()
}

Screenshots

No response

Example code

func myShow() {
window.Show()
time.Sleep(1 * time.Second)
window.SetFullScreen(true)
}

func myHide() {
window.SetFullScreen(false)
window.Hide()
}

myShow -> myHide -> myShow

Fyne version

2.4.5

Go compiler version

1.20

Operating system and version

windows 10

Additional Information

No response

[andydotxyz]

I cannot replicate from the code provided - please include a complete sample that demonstrates the problem.