borderline: adaptions to primitives

Handling and paint of borderlines greatly adapted
to primitive usage. Solved the double paint mechanisn
to no longer use the sc-local special cases. The
svx tooling for borderline paint is now the only one
and was extended to also handle diagonal lines.
Big cleanups/removals of old paint to OutputDevice
and sc-specific rendering. All other app-usages
of borderline also adapted. Preparations for careful
line-start/end adaption prepared and possible due to
unified coordinate-system usages and basegfx class-usage

Change-Id: If9e4efcfc0fe25e14d4052907038ca5cf222a432

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