[polari] mainWindow: Fix app-menu fallback

[Florian Müllner <fmuellner src gnome org>]

commit 1d443f234b50468c975f4d8ac68f3bb92c35669c
Author: Florian Müllner <fmuellner gnome org>
Date:   Thu Mar 10 23:24:31 2016 +0100

    mainWindow: Fix app-menu fallback
    
    Construct-only properties cannot be set from a template, so commit
    2d6ccc7c831 brought the fallback menubar back. We already show the
    fallback app menu in the headerbar, so disable it again.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=763873

 data/resources/main-window.ui |    1 -
 src/mainWindow.js             |    1 +
 2 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/data/resources/main-window.ui b/data/resources/main-window.ui
index 900f94b..2067a8b 100644
--- a/data/resources/main-window.ui
+++ b/data/resources/main-window.ui
@@ -12,7 +12,6 @@
   <template class="Gjs_MainWindow">
     <property name="title" translatable="yes">Polari</property>
     <property name="icon-name">org.gnome.Polari</property>
-    <property name="show-menubar">false</property>
     <child type="titlebar">
       <object class="GtkBox">
         <property name="visible">True</property>
diff --git a/src/mainWindow.js b/src/mainWindow.js
index e6eb44b..a46b113 100644
--- a/src/mainWindow.js
+++ b/src/mainWindow.js
@@ -114,6 +114,7 @@ const MainWindow = new Lang.Class({
 
     _init: function(params) {
         this._subtitle = '';
+        params.show_menubar = false;
 
         this.parent(params);