* [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
- separate validation, geometry and reference handling into
individual files
- improve 3d reference geometry handling
- eliminate duplicate dim creation code
- add Dimension reference repair dialog
- Refactor formatting out of DrawViewDimension
- move dimension repaint control to ViewProvider
* Using copy-ctor but class TechDraw::anglePoints has a trivial copy-ctor but non trivial assign operator [-Wclazy-rule-of-two-soft]
* Using copy-ctor but class TechDraw::arcPoints has a trivial copy-ctor but non trivial assign operator [-Wclazy-rule-of-two-soft]
* Missing reference in range-for with non trivial type [-Wclazy-range-loop-reference]
* C++11 range-loop might detach Qt container (QList) [-Wclazy-range-loop-detach]
* signal arguments need to be fully-qualified (TechDrawGui::QGIView instead of QGIView) [-Wclazy-fully-qualified-moc-types]
* Use multi-arg instead [-Wclazy-qstring-arg]
* Use midRef() instead [-Wclazy-qstring-ref]
* Support link and group objects
* Support view sync by implementing view provider API getMDIView()
* Use handleChangedPropertyType() for object migration instead of
reimplementing Restore() because of a lots of changes in
PropertyContainer::Restore().
* Various other small fixes.
