v0.4.5

Desktop app

• Control belongs to the window that reached the machine. Opening a shell another
  machine was running left this window read-only — a spectator of a shell it had
  just asked to work in — with the glow and 拿回控制权 drawn on the controlling
  machine while the machine being driven kept the keyboard. A tab on another
  machine now takes the lease as it opens: this window types, and the machine
  whose shell it is goes read-only behind the glow, saying who is typing into it.
  拿回控制权 there is still one click, and the hub always honours it.
• 会话 lists the picked machine's shells and nothing else. A tab on another
  machine used to be a row in this machine's list — it looked like one of this
  machine's shells — and picking it moved the panels to that machine, so
  switching tabs landed somewhere else entirely.
• The panel under the glow offers 接管 on a shell of another machine's rather than
  拿回控制权, which is what taking one is when the lease was never this window's.