protected void addDismissButton() {
		dismissButton = new JButton("Dismiss");
		dismissButton.setMnemonic('D');
		dismissButton.setName("Dismiss");
		dismissButton.getAccessibleContext().setAccessibleName("Dismiss");
		dismissButton.addActionListener(e -> dismissCallback());
		addButton(dismissButton);
	}
Adds a "Dismiss" button to the button panel.  The protected method
dismissCallback() will be invoked whenever the "Dismiss" button is pressed.
Ghidra/Framework/Docking/src/main/java/docking/DialogComponentProvider.java