Bug 81078 [preferences] Restore Defaults duplicates list entries
I200412142000 Restore Defaults on Java > Editor > Appearance duplicates the "Appearance color options" entries.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/LinkedModeConfigurationBlock.java
if (selection == null)
				selection= (String[]) list.get(0);
			fDecorationViewer.setSelection(new StructuredSelection((Object) selection), true);
		}
	}
	
	
	public void performOk() {
		super.performOk();
		
		getPreferenceStore().propagate();
	}
	
	
	public void performDefaults() {
		getPreferenceStore().loadDefaults();
		
		super.performDefaults();
	}
	
	public void dispose() {
		OverlayPreferenceStore store= getPreferenceStore();
		if (store != null) {
			store.stop();
		}
		
		super.dispose();
	}
}