Bug 320813 Minimized stacks are missing on restart
Run a fresh inner (no deltas) Detach the Outline view by dragging it right maximize the editor area close restart There are no minimized stacks visible If yoiu put a breakpoint in the WBWRenderer's processContents where it's restoring the trimBars before the restart you can see that there is only the one 'top' trim bar in the model, not sure where they went...I'll attach my deltas file, to my untrained eye the minimized stacks seem to be there (i.e. if you do a find on 'left(' there is a ToolControl defined).
bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/ui/internal/workbench/XMLModelReconciler.java
if (object instanceof MBindingTable) {
			for (MKeyBinding keyBinding : ((MBindingTable) object).getBindings()) {
				if (constructDeltas(deltas, references, (EObject) keyBinding, element, id)) {
					return true;
				}
			}
		}
		if (object instanceof MHandlerContainer) {
			for (MHandler handler : ((MHandlerContainer) object).getHandlers()) {
				if (constructDeltas(deltas, references, (EObject) handler, element, id)) {
					return true;
				}
			}
		}
		if (object instanceof MApplication) {
			for (MCommand command : ((MApplication) object).getCommands()) {
				if (constructDeltas(deltas, references, (EObject) command, element, id)) {
					return true;
				}
			}
		}
		if (object instanceof MPartDescriptorContainer) {
			for (MPartDescriptor descriptor : ((MPartDescriptorContainer) object).getDescriptors()) {
				if (constructDeltas(deltas, references, (EObject) descriptor, element, id)) {
					return true;
				}
			}
		}
		if (object instanceof MPart) {
			MPart part = (MPart) object;