AEM6 sp2 Touch UI force refresh on switch to preview

Is it possible to force refresh when switching to preview mode in TouchUI?

In Classic you can set the previewReload:"true" when launching the sidekick (see below), however I can't find anything similar to enable this in Touch UI.

ClassicUI

<script data-sly-test="${!wcmmode.disabled && !wcmInit.isTouchAuthoring}" type="text/javascript">

CQ.WCM.launchSidekick("${currentPage.path @ context='uri'}", {

        propsDialog: "${wcmInit.dialogPath @ context='uri'}",

        locked: ${currentPage.locked @ context="scriptString"},

        previewReload: "true"

    });

</script>

Any assistance would be greatly appreciated.