[TD] handle deletions of hatches

- also uniform line endings in ViewProviderLeader.cpp

src/Mod/TechDraw/Gui/ViewProviderGeomHatch.cpp

@@ -181,7 +181,6 @@ void ViewProviderGeomHatch::updateGraphic(void)
    }
 }
 
-
 void ViewProviderGeomHatch::getParameters(void)
 {
     Base::Reference<ParameterGrp> hGrp = App::GetApplication().GetUserParameter()
@@ -198,6 +197,14 @@ void ViewProviderGeomHatch::getParameters(void)
     WeightPattern.setValue(weight);
 }
 
+bool ViewProviderGeomHatch::canDelete(App::DocumentObject *obj) const
+{
+    // deletion of hatches don't destroy anything
+    // thus we can pass this action
+    Q_UNUSED(obj)
+    return true;
+}
+
 TechDraw::DrawGeomHatch* ViewProviderGeomHatch::getViewObject() const
 {
     return dynamic_cast<TechDraw::DrawGeomHatch*>(pcObject);