Proposal: Move Window.Resize() and Window.CenterOnScreen() to desktop package

[andydotxyz]

On thinking more about this I realise that having no-op functions at the top level isn't smart. I propose deprecating these and moving them to the desktop package, something like:

if win, ok := thisWin.(desktop.Window); ok {
    win.Resize(fyne.NewSize(200, 200))
}

It is a little more hidden away, but it does more truly stick to what will happen when called...?

[mortzdk]

I guess it makes sense that any "Desktop" related features are available from the desktop package instead of having to write noop functions etc. for other drivers.

[andydotxyz]

I think the feedback on moving CenterOnScreen is getting approval - but the Resize() feature is used far too much to bury away. I wonder if it should be renamed to indicate that it may not do what is expected - maybe RequestSize() could warrant it staying at the main Window interface?

[aohanhongzhi]

How to get the resolution of the computer screen and center the whole program interface?

[andydotxyz]

You center a window by calling Window.CenterOnScreen