ref: d2ddeb025f374eef4234007c19bd5f7bcc2d8118
parent: 0cd0d013de0f13501b5247c70a8619bfb57c97f7
author: Ori Bernstein <ori@eigenstate.org>
date: Wed Nov 4 18:22:22 EST 2020
clear win fully on close, don't double-send events, tweak shutdown code.