Bug 282008 [Compatibility] Support for 'sticky' views
We need to support the legacy 'sticky' view mechanism. This is used for Help, Cheat Sheets and such that need to remain visible across perspective switches.
bundles/org.eclipse.e4.ui.workbench.renderers.swt/src/org/eclipse/e4/workbench/ui/renderers/swt/StackModelFactory.java
if (part.getPolicy() != null && part.getPolicy().length() > 0) {
				String policy = part.getPolicy();
				if (policy.indexOf("ViewStack") >= 0) { 
					styleModifier = SWT.CLOSE;
				}
				if (policy.indexOf("EditorStack") >= 0) { 
					styleModifier = SWT.CLOSE;
					showCloseAlways = true;
				}
			}
			Composite stylingWrapper = createWrapperForStyling((Composite) parentWidget);
			
			final CTabFolder ctf = new CTabFolder(stylingWrapper, SWT.BORDER
					| styleModifier);
			configureForStyling(ctf);
			ctf.setUnselectedCloseVisible(showCloseAlways);
			bindWidget(part, ctf);
			ctf.setVisible(true);
			newWidget = ctf;
			final IEclipseContext folderContext = part.getContext();
			folderContext.set(IContextConstants.DEBUG_STRING, "TabFolder"); 
			final IEclipseContext toplevelContext = getToplevelContext(part);
			final IStylingEngine engine = (IStylingEngine) folderContext
					.get(IStylingEngine.class.getName());
			folderContext.runAndTrack(new Runnable() {
				public void run() {
					
					
					if (ctf.isDisposed())
						return;