Also make sure that value field is updated from name changes when the
symbol is a power symbol (even if it's from the schematic instead of
the library).
Fixes https://gitlab.com/kicad/code/kicad/issues/11093
Also fixes some plot bugs with arcs.
Also moves polygonization of arcs (when required) in plotting code
from 5 degrees to calculated based on ARC_HIGH_DEF.
Fixes https://gitlab.com/kicad/code/kicad/issues/5017
For historical reasons they are stored in a string using spaces as separators.
So each fp filter is now escaped to remove spaces (replaced by {space})
Fixes#9009https://gitlab.com/kicad/code/kicad/issues/9009
They don't define a KiCad string class, so the header file name was
somewhat misleading. But the fact that they didn't match definitely
made coding more difficult.