Fixed
- A sleeping tab's hover card had no picture of its page, and after a restart most tabs
are asleep. Zia now keeps each tab's picture as you leave it (taken once the browser is
idle and saved in the background, the last 400, never in a private window) and shows the
last one on a sleeping tab's card. - The picture's top corners didn't follow the card's: the picture clipped itself to a plain
round corner, not the card's squircle. Now the gap between them is even all the way round.