Hide Microsoft Store apps

[javidominguez]

Window hiding does not seem to work with Microsoft Store applications. It is added to the stack of hidden windows but still displayed.

[lukaszgo1]

I've received similar reports twice inn the past but since I'm not using any such apps myself and my main OS is still Windows 7 this is quite low on my list of priorities. I'll happily take a PR for this.

[mzanm]

Unfortunately this isn't possible do to UWP apps being sandboxed.