Materials: Child ignoring parent material

Inherit the material from the parent object when creating a new object,
such as during a boolean operation, or when extruding a sketch.

fixes #15503

src/Mod/Part/App/FeaturePartBoolean.cpp

@@ -136,6 +136,7 @@ App::DocumentObjectExecReturn* Boolean::execute()
             res = res.makeElementRefine();
         }
         this->Shape.setValue(res);
+        copyMaterial(base);
         return Part::Feature::execute();
     }
     catch (...) {