ChoiceFilteredPropertyColumn with setNullValid to true
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Key: WICKET-4412
URL: https://issues.apache.org/jira/browse/WICKET-4412
Project: Wicket
Issue Type: Improvement
Components: wicket
Affects Versions: 1.5.3
Reporter: Rotschi Fanky
Priority: Trivial
When filtering with a ChoiceFilteredPropertyColumn, the "Choose one" value
disappears, so you can't undo the filter.
Set "setNullValid" to true in the ChoiceFilter class so that you can choose the
null value.
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