TD: [skip ci] Fix several clazy issues:

* 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]

src/Mod/TechDraw/App/DrawProjectSplit.cpp

@@ -446,7 +446,7 @@ std::vector<TopoDS_Edge> DrawProjectSplit::removeDuplicateEdges(std::vector<Topo
     sorted.erase(last, sorted.end());                         //remove dupls
 
     //TODO: "sorted" turns to garbage if pagescale set to "0.1"!!!!???? ***
-    for (auto e: sorted) {
+    for (const auto& e: sorted) {
         if (e.idx < inEdges.size()) {
             result.push_back(inEdges.at(e.idx));                  //<<< ***here
         } else {