Successful web installer now doesn't show 503

package.json

@@ -49,7 +49,7 @@
     "nodebb-rewards-essentials": "0.0.6",
     "nodebb-theme-lavender": "3.0.1",
     "nodebb-theme-persona": "4.0.38",
-    "nodebb-theme-vanilla": "5.0.14",
+    "nodebb-theme-vanilla": "5.0.15",
     "nodebb-widget-essentials": "2.0.5",
     "nodemailer": "0.7.1",
     "npm": "^2.1.4",

public/src/installer/install.js

@@ -115,7 +115,7 @@ $('document').ready(function() {
 
 		$.post('/launch', function() {
 			setInterval(function() {
-				$.get('/admin', function(data) {
+				$.get('/admin').done(function(data) {
 					window.location = 'admin';
 				});
 			}, 750);

src/middleware/middleware.js

@@ -222,7 +222,7 @@ middleware.privateUploads = function(req, res, next) {
 
 middleware.busyCheck = function(req, res, next) {
 	if (global.env === 'production' && (!meta.config.hasOwnProperty('eventLoopCheckEnabled') || parseInt(meta.config.eventLoopCheckEnabled, 10) === 1) && toobusy()) {
-		res.type('text/html').sendFile(path.join(__dirname, '../../public/503.html'));
+		res.status(503).type('text/html').sendFile(path.join(__dirname, '../../public/503.html'));
 	} else {
 		next();
 	}