Booben crashes when I try to delete a route with content

[philipp-sorin]

Actually, some another flows lead to this exception. But the main reason is near this line

Here is a strict null check which is successfully passed by undefined value.
Correct code should look like if (currentRoute == null) or if(isNull(currentRoute) || isUndefined(currentRoute))

Exception call stack:
Uncaught TypeError: Cannot read property 'id' of undefined
at _class._renderRouteItem (ComponentsTreeView.js?c276:1274)
at _class.render (ComponentsTreeView.js?c276:1320)
at finishClassComponent (react-dom.development.js?054f:13193)
at updateClassComponent (react-dom.development.js?054f:13155)
at beginWork (react-dom.development.js?054f:13824)
at performUnitOfWork (react-dom.development.js?054f:15863)
at workLoop (react-dom.development.js?054f:15902)
at renderRoot (react-dom.development.js?054f:15942)
at performWorkOnRoot (react-dom.development.js?054f:16560)
at performWork (react-dom.development.js?054f:16482)

Steps to reproduce: