This should make Windows PCs look a little nicer, albeit inconsistent with others (Sergoe UI is unique). If it's good enough for GitHub, then it's good enough for October.
All text shadows have been stripped, along with some box shading. They were barely noticeable and should speed up the UI.
Removed the harsh title on popups
Anything considered an "overlay" now uses a box shading effect
The account menu now uses lighter shading
Introduced highlight states, allowing hover + active to behave independently