OptionaldisabledWhat is drawn on each edge of the selected block right now.
Resolved DATA, not accessors: each edge of a block is read from a different cell (see
FormatSelection.getEdgeStroke), and the panel is the one that knows which. Values also keep
this component honestly re-rendering — a bag of stable callbacks looks unchanged to React even
when the cells underneath have changed completely.
OptionalheightOptionalomittedEdges this selection cannot draw — the inner rules, on a selection with no inside.
Toggle edges with the panel's active pen, as one edit.
Mints the per-cell border the renderer draws.