We output a 0 opacity text in the SVG plotter to allow searching. When
this text is changed to 100 opacity, it can show up on the user screen
and so needs to be mirrored to match the stroke font output
Fixes https://gitlab.com/kicad/code/kicad/issues/5001
When plotting in Eeschema, various elements may be filled with either
the foreground or background colors. The fill mode is rather unique,
requiring un-stroked pie wedges for arcs and both closed and open filled
polylines.
Fixes: lp:1840769
* https://bugs.launchpad.net/kicad/+bug/1840769
(cherry picked from commit 213547f545f8d3914f811454c2158720b0671ebc)
This was previously "svg:g", but the SVG is declared with only
a "default" namespace, not an "svg:" namespace (looks like
xmlns:svg="http://www.w3.org/2000/svg" in the svg tag).
This means you cannot use svg: as a NS in the document. It's not
needed anywaY: the default is already correct.
Moreover, mismatching <svg:g> and </g> is always invalid.
Uses existing grouping in SVG output. Sets schematic components as a
grouped element in SVG as well as pcbnew elements per layer.
Fixes: lp:1011754
* https://bugs.launchpad.net/kicad/+bug/1011754
