[Feature Request] Window Previews on hover

[alexispurslane]

I helped a friend switch from Windows yesterday and one of the things we noticed is that the PopOS dock doesn't do the thing windows does where if you hover over an app icon it'll show you previews of the windows you have open of that app. At least, we haven't seen that happen — I'm a little confused, because I saw another issue here from a year ago that makes it seem like COSMIC dock actually does have that feature? anyway, if would be a nice feature to have!