Content Picker chooseButtonLabel doesn't work

Hi,

   I'm using Content Picker in javascript and want to change choose button label to "Move".  However the passed in option for chooseButtonLabel doesn't seem to work.  The choose button label is still "Choose".  Any suggestions? Thanks.

Here is my code:

var folderPicker = new Box.FolderPicker();

// Show the folder picker
folderPicker.show(folderId, accessToken, {
container: displayContainer,
canSetShareAccess: false,
canUpload: false,
maxSelectable: 1,
chooseButtonLabel: 'Move'
});