Need to remove the close button in Napari viewer when adding a widget with `add_dock_widget()`. [imagesc 67369](https://forum.image.sc/t/can-i-remove-the-close-icon-when-i-create-a-dock-widget-in-the-viewer-with-add-dock-widget/67369)
Need to remove the close button in Napari viewer when adding a widget with
add_dock_widget().imagesc 67369