* [TD]Cosmetic geometry and tools update
- all cosmetics to store geometry in same form
- all cosmetics to survive scaling and rotation
- extension functions to survive scaling and rotation
* [TD]overhaul leader point storage and editing
- add py routine makeLeader(points)
* [TD]add leader conversion utility
* [TD]Set Leader RotateWithView default to true
* [TD]fix intersection vertex position
* [TD]add CosmeticEdge::makeLineFromCanonicalPoints
* [TD]fix 2 Extension tools
- positioning in DrawCosmeticCircle
- mishandling of points in execLineParallelPerpendicular
* [TD]Remove duplicate constexpr
* [TD]fix 2x Cosmetic arc tools
* [TD]refactor LineFormat out of Cosmetic
* [TD]move cosmetic appearance settings to LineFormat
* [TD]remove 2 unused methods
* [TD]apply format to blue line & circle tools
* [TD]fix ballon arrowhead does not rotate with view
* [TD]fix CosmeticCircle3Points
* [TD]allow multiple cosmetic object deletions
* [TD]fix extend/shorten centerline
- section line convention label
- remove superfluous save/restore on changeEvent
- change default scrub count
- add preference for default symbol dir
- add preference for display of section cut line
