I knew there was a way to do this, but I could not remember, finally found it today! 🙂 Attached is a screenshot for you, that should do the trick if you set the properties as I highlighted in yellow, the main thing is the 'Single Column' check box needs to be unchecked, then when you expand the Listbox object, things should spread out and automatically put the | between the values as well I believe. Hopefully this works for you in that regard.
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