* [TD]allow DrawViewAnno to be attached to another view
* [TD]allow image and spreadsheet attach to view
* [TD]ensure correct parent in scene
* [TD]refactor command helpers to separate file
- gathering the helpers in one place
- helper redundancy to be address in another change
* [TD]create symbol, spreadsheet, image with parent
* [TD]fix claimChildren for some views
- also includes many lint fixes
* 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]
as discussed with luzpaz in https://github.com/FreeCAD/FreeCAD/pull/3735
there shouldn't be trailing newlines in translated strings.
- Moreover fix the logic of the output dialog text