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
else if (paneFolder.getTabPosition() == SWT.TOP
                        && localPos.y > paneFolder.getTabHeight())
                    tabUnderPointer = paneFolder.getSelection();
			}
			
			if (tabUnderPointer == null) {
				getSite().dragStart(paneFolder.getControl().toDisplay(localPos), false);
				return;
			}
			IPresentablePart part = getPartForTab(tabUnderPointer); 
			
			if (getSite().isPartMoveable(part)) {
				getSite().dragStart(part, 
					paneFolder.getControl().toDisplay(localPos), false);
			}
		}
	};
	
	private Listener selectionListener = new Listener() {
		public void handleEvent(Event e) {
			IPresentablePart item = getPartForTab((CTabItem)e.item);
			
			if (item != null) {
				getSite().selectPart(item);
			}
		}
	};
	
	private Listener resizeListener = new Listener() {
		public void handleEvent(Event e) {