show navbar image for halloween

packages/app/src/components/Theme/ThemeHalloween.module.scss

@@ -21,10 +21,6 @@ $light: lighten($secondary, 10%);
 // $dark: #;
 
 .growi:not(.login-page) {
-  #wrapper > .navbar {
-    background-image: url(/images/themes/halloween/halloween-navbar.jpg);
-  }
-
   // add background-image
   .page-editor-preview-container {
     background-image: url('/images/themes/halloween/halloween.jpg');
@@ -37,6 +33,10 @@ $light: lighten($secondary, 10%);
     width: 100%;
     height: 100%;
   }
+
+  .grw-navbar {
+    background-image: url('/images/themes/halloween/halloween-navbar.jpg') !important;
+  }
 }
 
 //== Light Mode