Add info about modern webui

Adds a small information note, regarding launching modern webui with
redirect link.

Signed-off-by: David Hanina <dhanina@redhat.com>
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>
Reviewed-By: Rob Crittenden <rcritten@redhat.com>

install/ui/src/freeipa/widgets/LoginScreen.js

@@ -53,6 +53,10 @@ define(['dojo/_base/declare',
 
         expired_msg: "Your session has expired. Please re-login.",
 
+        new_ui_msg: "<i class=\"fa fa-info-circle\"></i> We have launched " +
+            "new UI, <a href='${protocol}//${host}/ipa/modern-ui'>" + 
+            "try it out!</a>",
+
         form_auth_msg: "<i class=\"fa fa-info-circle\"></i> To log in with " +
             "<strong>username and password</strong>, enter them in the " +
             "corresponding fields, then click Login.",
@@ -532,6 +536,7 @@ define(['dojo/_base/declare',
 
         set_login_aside_text: function() {
             var aside = "";
+            aside += "<p>"+this.new_ui_msg+"<p/>"
             if (this.password_enabled()) {
                 aside += "<p>"+this.form_auth_msg+"<p/>";
             }
@@ -557,6 +562,11 @@ define(['dojo/_base/declare',
                 this.expired_msg
             );
 
+            this.new_ui_msg = text.get(
+                spec.new_ui_msg || '@i18n:login.new_ui_msg',
+                this.new_ui_msg
+            )
+
             this.form_auth_msg = text.get(
                 spec.form_auth_msg || '@i18n:login.form_auth',
                 this.form_auth_msg
@@ -586,6 +596,10 @@ define(['dojo/_base/declare',
                 .replace('${protocol}', window.location.protocol)
                 .replace('${host}', window.location.hostname);
 
+            this.new_ui_msg = this.new_ui_msg
+                .replace('${protocol}', window.location.protocol)
+                .replace('${host}', window.location.hostname);
+
             this.password_change_complete = text.get(
                 spec.password_change_complete ||
                     '@i18n:password.password_change_complete',

ipaserver/plugins/internal.py

@@ -411,6 +411,10 @@ class i18n_messages(Command):
             "login_certificate_desc": _("Log in using personal certificate"),
             "logout": _("Log out"),
             "logout_error": _("Log out error"),
+            "new_ui_msg": _(
+                "<i class=\"fa fa-info-circle\"></i> We have launched "
+                "new UI, <a href='${protocol}//${host}/ipa/modern-ui'>"
+                "try it out!</a>"),
             "password": _("Password"),
             "password_and_otp": _("Password or Password+One-Time Password"),
             "redirect_msg": _("You will be redirected in ${count}s"),