TableFilter does not like binded getItems()

**[Original report](https://bitbucket.org/controlsfx/controlsfx/issue/849) by Thomas Nield (Bitbucket: [thomasnield](https://bitbucket.org/thomasnield), GitHub: [thomasnield](https://github.com/thomasnield)).**

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It seems the TableFilter does not like it when the getItems() ObservableList is binded as a property.

Start by locating the TableFilter implementation and examining how it reads the table's getItems() ObservableList when that list is bound as a property. Reproduce the reported behavior with a bound list, then verify that TableFilter works correctly with both bound and unbound item lists.

Written by the indexing model from the issue text.