update: all operators to update an app

previously, the update info was restricted to admins. this can now be queried
by any authenticated user. update information can be gathered from listing apps and
then checking against appstore anyway.

dashboard/src/js/client.js

@@ -1400,8 +1400,6 @@ angular.module('Application').service('Client', ['$http', '$interval', '$timeout
     };
 
     Client.prototype.getUpdateInfo = function (callback) {
-        if (!this._userInfo.isAtLeastAdmin) return callback(new Error('Not allowed'));
-
         get('/api/v1/updater/updates', null, function (error, data, status) {
             if (error) return callback(error);
             if (status !== 200) return callback(new ClientError(status, data));
@@ -2644,9 +2642,10 @@ angular.module('Application').service('Client', ['$http', '$interval', '$timeout
         this.config(function (error, result) {
             if (error) return callback(error);
 
-            that.getUpdateInfo(function (error, info) { // note: non-admin users may get access denied for this
-                if (!error) result.update = info.update; // attach update information to config object
+            that.getUpdateInfo(function (error, info) {
+                if (error) return callback(error);
 
+                result.update = info.update;
                 that.setConfig(result);
                 callback(null);
             });