It's a catastrophe with windows. Make two windows snap to the borders, so together they're fullscreen? 2 pixel gap between the windows; 1 pixel gap at the right

It's a catastrophe with windows. Make two windows snap to the borders, so together they're fullscreen? 2 pixel gap between the windows; 1 pixel gap at the right, left and upper side; 2 pixel gap to the windows bar at the bottom. How can this be so hard? And even if it's hard, this is so obvious you really want to fix it.