Adhere to macOS style guidelines for icons

Coherence mode is awesome - however, a small change which I think would polish everything off nicely is to include padding around the icons for Windows apps. Currently they are (probably) just direct copies of the icons from Windows - but macOS icons actually include a bit of whitespace - so Windows icons look kinda big and cluttered on the macOS dock:



For context the padding is specified in Apple's style guidelines (https://developer.apple.com/design/human-interface-guidelines/app-icons#macOS) so that apps can have "objects" sit outside the bounds of the primary icon:



I manually did a similar thing with the Start Menu button but it would be great if this transformation to add the padding was already built-in: