Sync holo button bar styles with UX.

        <item name="divider">?android:attr/dividerVertical</item>

        <item name="showDividers">middle</item>

        <item name="dividerPadding">8dip</item>

        <item name="background">@android:drawable/btn_group_holo_dark</item>

        <item name="background">@null</item>

    </style>

    <style name="Holo.SegmentedButton" parent="SegmentedButton">

    </style>

    <style name="Holo.Light.ButtonBar" parent="Holo.ButtonBar">

        <item name="android:background">@android:drawable/btn_group_holo_light</item>

    </style>

    <style name="Holo.Light.ButtonBar.AlertDialog">