(Suggestion) Vista-style opaque titlebars/window borders when maximized

[DAPOPOBEFASTONYOAZZ]

Great work on this project so far and I'm impressed with the progress made on the master branch.

One feature I would love to see (re-implemented) is windows becoming opaque when maximized. Windows Vista had this functionality - presumably to cut down on resource usage due to hardware at the time - but was removed in Windows 7 in favor of transparent windows at any time. However, it can still be a neat effect with certain themes and colors and I would love to see it return. I believe that this is a DWM functionality, but I'm not entirely sure.

I can attach images of this later, if needed.

Thanks - keep up the good work.

Edit: sorry, I saw that there is an "ideas" section in discussions. I am still somewhat green to Github, so I am still learning where some of these sections are. Apologies for submitting this in issues.