ui: add user information on the Event-View in the UI (#2826)

For root/domain admins, adds the username column

ui/scripts/events.js

@@ -49,6 +49,9 @@
                         account: {
                             label: 'label.account'
                         },
+                        username: {
+                            label: 'label.username'
+                        },
                         domain: {
                             label: 'label.domain'
                         },
@@ -331,6 +334,15 @@
                                 else
                                     return true;
                             }
+                        },
+                        username: {
+                            label: 'label.username',
+                            isHidden: function(args) {
+                                if (isAdmin() || isDomainAdmin())
+                                    return false;
+                                else
+                                    return true;
+                            }
                         }
                     },