triggers panel: show data source info for trigger

src/panel-triggers/triggers_panel_ctrl.js

@@ -210,6 +210,8 @@ export class TriggerPanelCtrl extends PanelCtrl {
         return this.getAcknowledges(triggers, ds);
       }).then((triggers) => {
         return this.filterTriggers(triggers, ds);
+      }).then((triggers) => {
+        return this.addTriggerDataSource(triggers, ds);
       });
     });
 
@@ -277,6 +279,13 @@ export class TriggerPanelCtrl extends PanelCtrl {
     return triggerList;
   }
 
+  addTriggerDataSource(triggers, ds) {
+    _.each(triggers, (trigger) => {
+      trigger.datasource = ds;
+    });
+    return triggers;
+  }
+
   sortTriggers(triggerList) {
     if (this.panel.sortTriggersBy.value === 'priority') {
       triggerList = _.sortBy(triggerList, ['priority', 'triggerid']).reverse();