(discussion started here)
What:
- reduce the size of the button icons
- extend the clickable area of the buttons
- change the background color of the button when hovering
- add more distance between the buttons
- (maybe make the close button more red when hovering like in the mockup)
Why:
- the title bar would look narrower (many users don't like our title bar and prefer GNOME's headerbar in my opinion also because it looks too large)
- increased usability because the clickable area of the buttons is increased
^ if needed I can provide the SVG source of this mockup to try to implement it as a 1:1 copy
At the moment it seems to me that some pixels near the borders are used to resize the window, if so of course the green area below shouldn't trigger the buttons hovering but just let the user resize the window: