Cannot delete Node without links #182

What Im trying to do:
delete a node which I accidentially created and is not linked to anything.
Right click on the node, nothing happens

What I expected:
the dropdown to appear

What actually happened:
exception in the console:

    at t.value (portal.js:158)
value @ portal.js:158```

Environment:
OSX, Chrome Version 65.0.3325.146 (Official Build) (64-bit), plugins: https://imgur.com/a/vOPPD