(Splunk Enterprise 6.4.1) I have a prebuilt panel that contains a single value field, with a drilldown to another dashboard. I'd like to open the other dashboard in a new page. I've added the target="_blank" to the drilldown tag. This works great for an inline panel. However, once I convert the panel to a prebuilt panel and try to use it, the target is no longer honored. How do I make a prebuilt panel's drilldown open to another page?