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
private MouseListener mouseListener = new MouseAdapter() {
		public void mouseDown(MouseEvent e) {
			if (e.widget instanceof Control) {
				Control ctrl = (Control)e.widget;
				Point globalPos = ctrl.toDisplay(new Point(e.x, e.y));
				
				
				CTabItem newItem = paneFolder.getItem(paneFolder.getControl().toControl(globalPos));
				if (newItem != null) {
					CTabItem oldItem = paneFolder.getSelection();
					if (newItem != oldItem)
						return;
				}
				if (current != null) {
					current.setFocus();
				}
			}
		}
		
		public void mouseDoubleClick(MouseEvent e) {
			if (getSite().getState() == IStackPresentationSite.STATE_MAXIMIZED) {
				getSite().setState(IStackPresentationSite.STATE_RESTORED);
			} else {
				getSite().setState(IStackPresentationSite.STATE_MAXIMIZED);
			}
		}
	};
	
	private MouseListener titleMouseListener = new MouseAdapter() {
		public void mouseDown(MouseEvent e) {