Bug 51665 [CoolBar] Extra flashiness when switching between perspectives
build I20040210-0800 In same window, - open a java perspective - open several java editors - open debug perspective - switch back and forth between java and debug perspectives The coolbar is noticeably flashier than it was in M6.
bundles/org.eclipse.jface/src/org/eclipse/jface/action/CoolBarManager.java
* new control if one already exists.
     * 
     * @param parent
     *            the parent control
     * @return the cool bar control
     */
    public CoolBar createControl(Composite parent) {
        Assert.isNotNull(parent);
        if (!coolBarExist()) {
            coolBar = new CoolBar(parent, itemStyle);
            coolBar.setMenu(getContextMenuControl());
            coolBar.setLocked(false);
            coolBar.addListener(SWT.Resize, new Listener() {
                public void handleEvent(Event event) {
                    coolBar.getParent().layout();
                }
            });
            update(false);
        }
        return coolBar;
    }
    /**
     * Disposes of this cool bar manager and frees all allocated SWT resources.
     * Notifies all contribution items of the dispose. Note that this method
     * does not clean up references between this cool bar manager and its
     * associated contribution items. Use <code>removeAll</code> for that
     * purpose.
     */
    public void dispose() {
        if (coolBarExist()) {