Remove section line from DVP on delete of DVS

src/Mod/TechDraw/App/DrawViewSection.cpp

@@ -506,6 +506,11 @@ Base::Vector3d DrawViewSection::getSectionVector (const std::string sectionName)
     return adjResult;
 }
 
+void DrawViewSection::unsetupObject()
+{
+    getBaseDVP()->touch();
+}
+
 TechDraw::DrawViewPart* DrawViewSection::getBaseDVP()
 {
     TechDraw::DrawViewPart* baseDVP = nullptr;

src/Mod/TechDraw/App/DrawViewSection.h

@@ -89,6 +89,7 @@ public:
     Base::Vector3d getSectionVector (const std::string sectionName);
     TechDraw::DrawViewPart* getBaseDVP();
     TechDraw::DrawProjGroupItem* getBaseDPGI();
+    virtual void unsetupObject();
 
     static const char* SectionDirEnums[];