Unable to select the sleeper volume box after adding
<property name="SleeperVolumeSize" value="3, 2, 3" />
<property name="SleeperVolumeStart" value="3, 1, 3" />
<property name="SleeperVolumeGroup" value="S_-_Group_Zom_Soldier" />
<property name="SleeperIsLootVolume"...