ref: 34ed7f7aa25b3d4b6990d454b63b6b11441c3e5a
parent: c20f68f8017f98df3613108a17087d56125392b7
author: Ori Bernstein <ori@eigenstate.org>
date: Mon Feb 1 15:38:40 EST 2021
Mail: only clear upas-maintained flags on change (thanks deuteron) When message flags change, Mail would clear all the flags and recompute them. This would clobber internal flags like Ftodel. So, don't do that.