persist update indicator across restarts

part of #749

src/apps.js

@@ -135,7 +135,6 @@ var appdb = require('./appdb.js'),
     superagent = require('superagent'),
     tasks = require('./tasks.js'),
     TransformStream = require('stream').Transform,
-    updateChecker = require('./updatechecker.js'),
     users = require('./users.js'),
     util = require('util'),
     uuid = require('uuid'),
@@ -1321,9 +1320,6 @@ function update(app, data, auditSource, callback) {
 
         eventlog.add(eventlog.ACTION_APP_UPDATE, auditSource, { appId, app, skipBackup, toManifest: manifest, fromManifest: app.manifest, force: data.force, taskId: result.taskId });
 
-        // clear update indicator, if update fails, it will come back through the update checker
-        updateChecker.resetAppUpdateInfo(appId);
-
         callback(null, { taskId: result.taskId });
     });
 }