Bug 335444 Detached windows do not get rendered automatically
I20110125-2200 1. F1 2. Detach the 'Help' view. 3. It has now disappeared. 4. Pressing 'F1' again does nothing. Resetting the perspective doesn't help. Closing and reopening the perspective doesn't help. Restarting doesn't help. If you restart the 'Help' view will appear in a detached window.
bundles/org.eclipse.e4.ui.workbench.swt/src/org/eclipse/e4/ui/internal/workbench/swt/PartRenderingEngine.java
SafeRunner.run(new ISafeRunnable() {
			public void handleException(Throwable e) {
				if (e instanceof Error) {
					
					throw (Error) e;
				} else {
					
					if (logger != null) {
						String message = "Exception occurred while unrendering: {0}"; 
						logger.error(e, NLS.bind(message, element));
					}
				}
			}
			public void run() throws Exception {
				safeRemoveGui(element);
			}
		});
	}
	private void safeRemoveGui(MUIElement element) {
		if (removeRoot == null)
			removeRoot = element;
		renderedElements.remove(element);
		
		
		MUIElement parent = element.getParent();
		AbstractPartRenderer parentRenderer = parent != null ? getRendererFor(parent)
				: null;
		if (parentRenderer != null) {