Bug 65444 [R21PRES] Close button shown when views not closeable
RC1 build - run the browser example using the R2.1 presentation - the views have close buttons in the titlebar, but should not because the perspective has fixed="true" (meaning that all initial views are non-moveable and non-closeable)
bundles/org.eclipse.ui.presentations.r21/src/org/eclipse/ui/internal/presentations/R21BasicStackPresentation.java
}
		createPartTab(newPart, index);
		
		setControlSize();
	}
	/* (non-Javadoc)
	 * @see org.eclipse.ui.internal.skins.StackPresentation#removePart(org.eclipse.ui.internal.skins.IPresentablePart)
	 */
	public void removePart(IPresentablePart oldPart) {
	    if (current == oldPart)
	        current = null;
	    
		CTabItem item = getTab(oldPart);
		if (item == null) {
			return;
		}
		oldPart.setVisible(false);		
		
		item.dispose();
	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.ui.internal.skins.StackPresentation#selectPart(org.eclipse.ui.internal.skins.IPresentablePart)
	 */
	public void selectPart(IPresentablePart toSelect) {
		if (toSelect == current) {
			return;
		}
		
		if (current != null) {