In a ChoiceBox, the underscore is removed from the popup list. Once the item is selected, the underscore appears.
e.g. try with "item_1". The popup list displays "item1
e.g. try with "item_1". The popup list displays "item1
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JDK-8128662 Underscores do not display properly in MenuButton and SplitMenuButton
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     - Closed
 
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