appearance.addFill copies the active fill row only when the call has no
`ids`, no `id` and no `target: "contents"`; the params text now names
`id` too. appearance.addStroke gives the new stroke at least 1 pt, so a
0.5 pt top stroke gives a 1 pt stroke; the params text now says so.
Tests pin both: `id` alone leaves the active row alone and puts the new
fill on top, and Add New Stroke on a 0.5 pt stroke adds a 1 pt one.
dotCooCoo
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