mail: rework the eventlog

src/js/index.js

@@ -390,7 +390,8 @@ app.filter('prettyHref', function () {
 
 app.filter('prettyEmailAddresses', function () {
     return function prettyEmailAddresses(addresses) {
-        if (!addresses || addresses === '<>') return '<>';
+        if (!addresses) return '';
+        if (addresses === '<>') return '<>';
         if (Array.isArray(addresses)) return addresses.map(function (a) { return a.slice(1, -1); }).join(', ');
         return addresses.slice(1, -1);
     };