better title for multilayer properties

GUI/View/SampleDesigner/MultiLayerForm.cpp

@@ -64,7 +64,7 @@ MultiLayerForm::MultiLayerForm(QWidget* parent, MultiLayerItem* multiLayerItem,
     m_layout = new QVBoxLayout(this);
 
     auto props = new QGroupBox(this);
-    props->setTitle("Multilayer properties");
+    props->setTitle("Sample");
     FormLayouter layouter(props, ec);
     layouter.setContentsMargins(6, 6, 0, 6);
     layouter.addValue(multiLayerItem->crossCorrLength());