NPE in Fabric Explorer Tree when selecting Refresh when you are disconnected

java.lang.NullPointerException
	at com.fusesource.ide.fabric.navigator.VersionsNode.loadChildren(VersionsNode.java:40)
	at com.fusesource.rider.commons.tree.RefreshableNode.checkLoaded(RefreshableNode.java:79)
	at com.fusesource.ide.fabric.navigator.VersionsNode.getDefaultVersionNode(VersionsNode.java:55)
	at com.fusesource.ide.fabric.navigator.Fabric.getDefaultVersionNode(Fabric.java:163)
	at com.fusesource.ide.fabric.actions.CreateSshAgentAction.<init>(CreateSshAgentAction.java:31)
	at com.fusesource.ide.fabric.navigator.Fabric.provideContextMenu(Fabric.java:159)
	at com.fusesource.ide.jmx.ui.internal.views.navigator.ActionProvider.fillContextMenu(ActionProvider.java:74)
	at org.eclipse.ui.navigator.NavigatorActionService$2.run(NavigatorActionService.java:221)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.ui.navigator.NavigatorActionService.addCommonActionProviderMenu(NavigatorActionService.java:216)
	at org.eclipse.ui.navigator.NavigatorActionService.fillContextMenu(NavigatorActionService.java:173)
	at org.eclipse.ui.navigator.CommonNavigatorManager.fillContextMenu(CommonNavigatorManager.java:260)
	at org.eclipse.ui.navigator.CommonNavigatorManager$4.menuAboutToShow(CommonNavigatorManager.java:275)
	at org.eclipse.jface.action.MenuManager.fireAboutToShow(MenuManager.java:342)
	at org.eclipse.jface.action.MenuManager.handleAboutToShow(MenuManager.java:473)
	at org.eclipse.jface.action.MenuManager.access$1(MenuManager.java:469)
	at org.eclipse.jface.action.MenuManager$2.menuShown(MenuManager.java:495)
	at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:247)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4128)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1457)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1480)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1461)
	at org.eclipse.swt.widgets.Menu.menuWillOpen(Menu.java:805)
	at org.eclipse.swt.widgets.Display.windowProc(Display.java:5525)
	at org.eclipse.swt.internal.cocoa.OS.objc_msgSend(Native Method)
	at org.eclipse.swt.internal.cocoa.NSMenu.popUpContextMenu(NSMenu.java:73)
	at org.eclipse.swt.widgets.Menu._setVisible(Menu.java:277)
	at org.eclipse.swt.widgets.Display.runPopups(Display.java:4051)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3606)
	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2696)
	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2660)
	at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2494)
	at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:674)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:667)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:123)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:344)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:622)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1410)