FIXME comment about mutate pass not being run

[waywardmonkeys]

In the Masonry calculator example, there is this bit of code:

            Update::HoveredChanged(true) => {
                ctx.mutate_later(&mut self.inner, move |mut inner| {
                    SizedBox::set_border(&mut inner, Color::WHITE, 3.0);
                });
                // FIXME - This is a monkey-patch for a problem where the mutate pass isn't run after this.
                // Should be fixed once the pass spec RFC is implemented.
                ctx.request_anim_frame();
            }

Is that FIXME still valid and if so, is there an issue tracking the missing functionality?