workaround for focusing windows with crappy macOS accessibility API

[koekeishiya]

After reverse engineering the WindowServer to figure out how to implement autofocus I have been able to reconstruct a different workaround to the A B C B focusing issue when multiple displays are in use.

How to reproduce the original problem:

Display 1: Open Terminal (A) and a Chrome window (B)
Display 2: Open a Chrome window (C)

Focus Chrome (B) on Display 1, and then focus Terminal (A) on Display 1.
Try to focus Chrome (C) on Display 2.

When using the accessibility API to focus the window, Chrome (B) on Display 1 would be focused.

After these changes we can now properly focus the Chrome (C) window on Display 2, without having to rely on the scripting-addition.