Bug fix: Nonresizable windows should not be able to maximize in Windows

[veniamin-ilmer]

There was a bug with Windows: Nonresizable windows should not be able to maximize.

Nonresizable windows should not be able to maximize. I updated the functionality in Windows for both initialization, and the set_resizable method, to disable maximizing when the window is nonresizable.

I asked about it earlier here - https://github.com/rust-windowing/winit/discussions/2987

It was already documented in the Changelog here - https://github.com/rust-windowing/winit/blob/master/CHANGELOG.md#version-0162-2018-07-07

• [X] Tested on Windows

[teknalb]

Could someone merge this fix please? it is broken on windows for long time!

[teknalb]

🤞

[teknalb]

@madsmtm @notgull

You can do it guys I believe in you.