Stop cursor blinking after idling for x minutes

[Tyriar]

Context: #4082 (comment)

To solve the power problem, maybe we should just detect when the terminal is focused and idle as that's the main case I'm concerned about. Something like a setTimeout(2 * 60 * 1000) which clears on focus out and resets on any input. Let's tackle that separately to #4568 though

[Tyriar]

The IdleDetector API looks great for this, but it requires permission https://developer.chrome.com/articles/idle-detection/

[Tyriar]

It also can only be used on user activation

[jerch]

Yeah the IdleDetector API sounds too invasive, ppl would find many reasons not to allow that.

Would a heuristic respecting things like "not focused", "no mouse move for x seconds" or "no user input/write attempt for y seconds" do? This still would fail on ppl just sitting in front of the computer staring at the display, but imho the IdleDetector API would have the same issue.