Fixes#2409
This is one of the weirder macOS quirks (bugs? who knows!) I've seen
recently. The bug as described in #2409: when you have at least two
monitors ("screens" in AppKit parlance), Ghostty on one, a focused app
on the other, and you toggle the quick terminal, the quick terminal
does not have focus.
We already knew and accounted for the fact that
`window.makeKeyAndOrderFront(nil)` does not work until the window is visible
and on the target screen. To do this, we only called this once the
animation was complete. For the same NSScreen, this works, but for
another screen, it does not.
Using one DispatchQueue.async tick also does not work. Based on testing,
it takes anywhere from 2 to 5 ticks to get the window focus API to work
properly. Okay.
The solution I came up with here is to retry the focus operation every
25ms up to 250ms. This has worked consistently for me within the first 5
ticks but it is obviously a hack so I'm not sure if this is all right.
This fixes the issue but if there's a better way to do this, I'm all
ears!
Fixes#2330
The quick terminal now supports fullscreen. The fullscreen mode is
always non-native due to the quick terminal being a titleless, floating
window.
When the quick terminal loses focus and animates out, it will always
exit fullscreen mode.
