Bug 6092 JavaEditor should honor the tab width setting of the JavaFormatter
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/JavaEditorPreferencePage.java
fFontEditor.loadDefault();
		
		fOverlayStore.loadDefaults();
		initializeFields();
		handleListSelection();
		
		super.performDefaults();
		
		fPreviewViewer.invalidateTextPresentation();
	}
	
	/*
	 * @see DialogPage#dispose()
	 */
	public void dispose() {
		
		if (fJavaTextTools != null) {
			fJavaTextTools= null;
		}
		
		fFontEditor.setPreferencePage(null);
		fFontEditor.setPreferenceStore(null);
		
		if (fOverlayStore != null) {
			fOverlayStore.stop();
			fOverlayStore= null;
		}
		
		super.dispose();