st3m: use ctx hairline renderer for scope
A 1px wide stroke for the scope does not look as sharp as the default line width, but on top of !583 (merged) it is faster and we can render all samples without decimation.
A 1px wide stroke for the scope does not look as sharp as the default line width, but on top of !583 (merged) it is faster and we can render all samples without decimation.