protected FieldPanel createFieldPanel(LayoutModel model) {
		FieldPanel fp = new FieldPanel(model, "Listing");
		fp.setFieldDescriptionProvider(new ListingFieldDescriptionProvider());
		return fp;
	}
A width for new windows that shows a reasonable amount of the Listing

@return the width
Ghidra/Features/Base/src/main/java/ghidra/app/util/viewer/listingpanel/ListingPanel.java