Fixed
- A folder opened where it is inside a closed folder grows and shrinks
smoothly both ways: closing, its tabs dropped to nothing at once and faded
on top of the tab shown; opening again, they were there at once (thanks
Bxthesda). - With Ultra on, the drifting colour round the open essential carries on
where it was when a glance on it closes, rather than jumping back to the
start of its cycle.