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
parentRenderer.hideChild(element.getParent(), element);
		}
		AbstractPartRenderer renderer = getRendererFor(element);
		
		if (renderer != null) {
			if (element instanceof MElementContainer<?>) {
				MElementContainer<MUIElement> container = (MElementContainer<MUIElement>) element;
				MUIElement selectedElement = container.getSelectedElement();
				List<MUIElement> children = container.getChildren();
				for (MUIElement child : children) {
					
					if (child != selectedElement) {
						removeGui(child);
					}
				}
				if (selectedElement != null
						&& children.contains(selectedElement)) {
					
					removeGui(selectedElement);
				}
			}
			if (element instanceof MPerspective) {
				MPerspective perspective = (MPerspective) element;
				for (MWindow subWindow : perspective.getWindows()) {
					removeGui(subWindow);
				}
			} else if (element instanceof MWindow) {
				MWindow window = (MWindow) element;
				for (MWindow subWindow : window.getWindows()) {
					removeGui(subWindow);