Render the login form again upon authfail.

docs/CHANGES.md

@@ -9,6 +9,7 @@
 - Use lodash instead of underscore.js [jcbrand]
 - Escape user-generated input to prevent JS-injection attacks. (Thanks to SamWhited) [jcbrand]
 - Improved roster filter UX. [jcbrand]
+- Render the login form again upon authfail. [jcbrand]
 - #486 Honor existing mam user configuration [throwaway42]
 - #749 /me will show your contact's name in the sent field [jcbrand]
 - #774 Browser language (fr-fr or fr) is not detected by default [jcbrand]

src/converse-core.js

@@ -495,6 +495,7 @@
             } else if (status === Strophe.Status.AUTHFAIL) {
                 _converse.giveFeedback(__('Authentication Failed'), 'error');
                 _converse.setDisconnectionCause(status, condition, true);
+                _converse.onDisconnected();
             } else if (status === Strophe.Status.CONNFAIL) {
                 _converse.giveFeedback(
                     __('Connection failed'), 'error',