bug #1046 Fix demo password autofill on Firefox (bocharsky-bw)

This PR was merged into the master branch.

Discussion
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Fix demo password autofill on Firefox

This PR fixes demo password auto-filling on Firefox, steps to reproduce:
1. Open the login page in FF: https://localhost:8000/en/login
2. Reload the page and see empty password - looks like FF clears it due to security reasons but keeps the username

Commits
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c57a9a0 Fix demo password autofill on Firefox

Author: javiereguiluz

assets/js/login.js

@@ -4,7 +4,7 @@ $(function() {
 
     // in a real application, hardcoding the user/password would be idiotic
     // but for the demo application it's very convenient to do so
-    if (!usernameEl.val() && !passwordEl.val()) {
+    if (!usernameEl.val() || 'jane_admin' === usernameEl.val()) {
         usernameEl.val('jane_admin');
         passwordEl.val('kitten');
     }

public/build/app.js

@@ -42,9 +42,9 @@
     "/build/runtime.js": "sha384-/Zh0hTCgqMfXwZfeMIiueZzsKiHkvtqEOzKpZAuznIbgqg1DQpUQAwwNlO/9ToVH",
     "/build/0.js": "sha384-Dt6rncfcL40e91sPDLy/fZ8XgfH6ZZmLY1+ajXaPmGFGTb5XNtWS5jmf84NoZT/f",
     "/build/1.js": "sha384-bmKW9QGT6CjdvJr6hoYLCByhKzyjU+g+gUJ5SGOSxqUm4jzLuBhDpl0hImY/1R3M",
-    "/build/app.js": "sha384-/3gf9IHx1zzgGuRgdnnW/2AJBU896jAJn1dDLJLb3vBkLQkE8WvI3ycZt0l0GECV",
+    "/build/app.js": "sha384-uCtNC3fXHx82+vdtTkHRXofGzNn6MJtN1ChaO2RaxA2IaRj/Ybj3QNldmJ6X0jI1",
     "/build/app.css": "sha384-NGTdnyfcvVpvCvvEryRps/xU6Mb67YeTf1pvFrUkd80uXKIuxzYmcXzvzttKu4d0",
-    "/build/login.js": "sha384-tCP53hf/3uu7W5h5syxKODJjjos7AyGM/lENitUwFKSXMxQsWP+50V0mN6bcImAo",
+    "/build/login.js": "sha384-w5qwGnj2mp4pazKe9KGCQU+FR1n/717WouCp594UxY7HHGLafcGrZ9mrFR68V6oe",
     "/build/2.js": "sha384-zrtPryvCde+sRepOgkuLELopii2NoIgS3rrkpCfY8e7nT359Sc0tXRG2QqsKLfEO",
     "/build/admin.js": "sha384-My30UK7GowsN0RikK0XGQk7gvdtxxZsz2f52md+YoV4YZu4yjMArjwO7ZwE7K4av",
     "/build/admin.css": "sha384-NMnc2b6jJOZO4QiUk4TgitF+ipl41B2+0TFmAwGqpQ6cinY6Q6mb1watPtAAWkAZ",