Added the smart word wrap property to preview label

(cherry picked from commit 0b55eedc522ded7b889970ee1daa20435e11c847)

editor/rename_dialog.cpp

@@ -284,6 +284,7 @@ RenameDialog::RenameDialog(SceneTreeEditor *p_scene_tree_editor, UndoRedo *p_und
 	vbc->add_child(lbl_preview_title);
 
 	lbl_preview = memnew(Label);
+	lbl_preview->set_autowrap(true);
 	vbc->add_child(lbl_preview);
 
 	// ---- Dialog related