It’s the info you get from using the mouse to hover over things on the screen.
That patch note is saying they disabled cursor mode in Alt only. They did not disable it in tab. All of the items that appeared on Alt also appear on tab where the cursor is still enabled and you can see extra info by hovering over an object on the screen.
You are all mad! The sun is definitely getting oxygen! The giant space bellows hide just out of sight on the precisely opposite side of the sun from earth, so we’ve never been able to observe them.
Gringolth the oxidation wizard had been pumping them for millions of years. The biggest risk is that he dies before being replaced by an offspring!