Selection will be cleared while playing

Due to current framing strategy, xterm-player will refresh whole terminal if moving from a frame to next frame. https://github.com/JavaCS3/xterm-player/blob/2462cdbc378ffd47418d8772b365ed7c287c9877/src/Player.ts#L151-L161