Documentation: SetIcon on Windows must be a .ico file otherwise LoadImageW returns 0x0 and error DNS_ERROR_RCODE_NO_ERROR

[Southclaws]

I spent a bit of time debugging this and trying things so it's worth mentioning in the docs. Issue title for SEO to help others who may run into this.

On mac you can have an optional .png as an icon, but Windows requires an icon (in order to call other APIs, such as Shell_NotifyIcon the icon must be present)

Hopefully this helps someone!

[z1076]

Thank!!!! bro.