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
if (e.widget instanceof Control) {
				Control ctrl = (Control)e.widget;
				Point globalPos = ctrl.toDisplay(new Point(0, titleLabel.getBounds().height));
				if ((e.button == 1) && overImage(e.x))
					showSystemMenu(globalPos);
			}
		}
	};
	
	private Listener menuListener = new Listener() {
		/* (non-Javadoc)
		 * @see org.eclipse.swt.widgets.Listener#handleEvent(org.eclipse.swt.widgets.Event)
		 */
		public void handleEvent(Event event) {
			Point pos = new Point(event.x, event.y);
			showSystemMenu(pos);
		}
	};
	
	private Listener dragListener = new Listener() {
		public void handleEvent(Event event) {
			
			Point localPos = new Point(event.x, event.y);
			CTabItem tabUnderPointer = paneFolder.getItem(localPos);
			
			if (tabUnderPointer == null) {
				if (paneFolder.getTabPosition() == SWT.BOTTOM
                        && localPos.y < paneFolder.getControl().getBounds().height
                                - paneFolder.getTabHeight())
                    tabUnderPointer = paneFolder.getSelection();