don't show time for triggers with lastchange=0, fix #412

dist/panel-triggers/partials/module.html

@@ -25,7 +25,7 @@
                     ng-style="{color: trigger.color}">
                     {{trigger.severity}}
                   </span>
-                  for {{trigger.age}}
+                  {{trigger.age && "for " + trigger.age}}
 
                   <span class="alert-list-info alert-list-info-left" ng-if="ctrl.panel.descriptionField">
                     {{trigger.comments}}
@@ -39,7 +39,7 @@
                   <i class="gicon gicon-datasources"></i>
                   {{trigger.datasource}}
                 </span>
-                <span class="alert-list-text">{{trigger.lastchange}}</span>
+                <span class="alert-list-text">{{trigger.lastchange || "last change unknown"}}</span>
               </div>
 
               <div class="trigger-info-block">

dist/panel-triggers/triggers_panel_ctrl.js

@@ -476,6 +476,12 @@ System.register(['lodash', 'jquery', 'moment', '../datasource-zabbix/utils', 'ap
         }, {
           key: 'setTriggerLastChange',
           value: function setTriggerLastChange(trigger) {
+            if (!trigger.lastchangeUnix) {
+              trigger.lastchange = "";
+              trigger.age = "";
+              return trigger;
+            }
+
             var timestamp = moment.unix(trigger.lastchangeUnix);
             if (this.panel.customLastChangeFormat) {
               // User defined format