Bug 18266 Turning off lightbulb preference doesn't turn the lights off right away
When you turn off the lightbulb preference, editors with existing lightbulbs continue to show them. Closing and reopening the editors gets rid of them.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/JavaEditorPreferencePage.java
public void widgetDefaultSelected(SelectionEvent e) {
		}
		public void widgetSelected(SelectionEvent e) {
			ColorEditor editor= (ColorEditor) e.widget.getData();
			PreferenceConverter.setValue(fOverlayStore, (String) fColorButtons.get(editor), editor.getColorValue());
		}
	};
	
	private Map fCheckBoxes= new HashMap();
	private SelectionListener fCheckBoxListener= new SelectionListener() {
		public void widgetDefaultSelected(SelectionEvent e) {
		}
		public void widgetSelected(SelectionEvent e) {
			Button button= (Button) e.widget;
			fOverlayStore.setValue((String) fCheckBoxes.get(button), button.getSelection());
		}
	};
	
	private Map fTextFields= new HashMap();
	private ModifyListener fTextFieldListener= new ModifyListener() {
		public void modifyText(ModifyEvent e) {
			Text text= (Text) e.widget;
			fOverlayStore.setValue((String) fTextFields.get(text), text.getText());
		}
	};
	private ArrayList fNumberFields= new ArrayList();
	private ModifyListener fNumberFieldListener= new ModifyListener() {
		public void modifyText(ModifyEvent e) {
			numberFieldChanged((Text) e.widget);
		}