Add macos and windows10

[HLFH]

Hi,

I am:

• adding some missing icons;
• deleting incorrect macOS icons;
• adding macOS icon;
• adding Windows 10 icon.

[HLFH]

I have centered the icons (vertical and horizontal alignment). I also have correctly set the canvas size with width and height of 128 px for these OS icons. I also have correctly selected the icons in the SVG file and set them roughly (w/ width/height lock) in a square with a side of 96 px.

[HLFH]

[bobafetthotmail]

Thanks, merged. I also used your screenshot as the "dark theme" in the readme because it shows a MacOS icon