fix(webui): use text type for email input

We don't need the browser to validate the input because the game accepts emails with nothing before the @ which the browser may not.

static/webui/index.html

@@ -83,7 +83,7 @@
                 <p data-loc="login_description"></p>
                 <form onsubmit="doLogin();return false;">
                     <label for="email" data-loc="login_emailLabel"></label>
-                    <input class="form-control" type="email" id="email" required />
+                    <input class="form-control" type="text" id="email" required />
                     <br />
                     <label for="password" data-loc="login_passwordLabel"></label>
                     <input class="form-control" type="password" id="password" required />