@Override
		public void remove(AbstractButton b) {
			if (b == null) {
				return;
			}
			buttons.removeElement(b);
			if (b.getModel() == overriddenSelection) {
				overriddenSelection = null;
			}
			b.getModel().setGroup(null);
		}
SCR 3962 - in this mode we allow the user to press Enter/OK with no text in
the text field, which means to user the current directory as the selected dir
Ghidra/Framework/Docking/src/main/java/docking/widgets/filechooser/GhidraFileChooser.java