Don't use ts() in smarty templates

There is apparently some confusion about when to use ts() vs

{ts} in javascript.
Although the javascript ts() function may seem to work when used in a template, it isn't actually going to pull the necessary translation because the js isn't being added via CRM_Core_Resources::addScriptFile (which is responsible for parsing js files for ts()). Smarty templates should always use the smarty {ts}

function for translating strings.