Bug 63420 [R21PRES] Flash on tab switch
bundles/org.eclipse.ui.presentations.r21/src/org/eclipse/ui/internal/presentations/R21EditorStackPresentation.java
updateGradient();
		}
	};
	/**
	 * Create a new presentation stack.
	 * 
	 * @param parent
	 *            the parent widget
	 * @param stackSite
	 *            the site
	 */
	public R21EditorStackPresentation(Composite parent,
			IStackPresentationSite stackSite) {
		super(stackSite);
		
		tabFolder = new CTabFolder(parent, tabPos | SWT.BORDER);
		
		tabFolder.MIN_TAB_WIDTH = preferenceStore
				.getInt(IPreferenceConstants.EDITOR_TAB_WIDTH);
		
		tabFolder.setTabList(new Control[0]);
		
		tabFolder.addCTabFolderListener(closeListener);
		
		tabFolder.addListener(SWT.Selection, selectionListener);
		
		tabFolder.addListener(SWT.Resize, resizeListener);
		
		
		tabFolder.addMouseListener(mouseListener);