[gnome-builder] glade: be explicit about lack of split support

[Christian Hergert <chergert src gnome org>]

commit 3b1e093da513549f8ab6cb9a330404ea9f320cf3
Author: Christian Hergert <chergert redhat com>
Date:   Mon Oct 22 13:57:33 2018 -0700

    glade: be explicit about lack of split support

 src/plugins/glade/gbp-glade-view.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/src/plugins/glade/gbp-glade-view.c b/src/plugins/glade/gbp-glade-view.c
index 0a82d0c07..f9d7e91d7 100644
--- a/src/plugins/glade/gbp-glade-view.c
+++ b/src/plugins/glade/gbp-glade-view.c
@@ -121,6 +121,7 @@ gbp_glade_view_init (GbpGladeView *self)
     { "align-edit", "glade-align-edit", N_("Switch to alignment editor") },
   };
 
+  ide_layout_view_set_can_split (IDE_LAYOUT_VIEW (self), FALSE);
   ide_layout_view_set_menu_id (IDE_LAYOUT_VIEW (self), "gbp-glade-view-menu");
   ide_layout_view_set_title (IDE_LAYOUT_VIEW (self), _("Unnamed Glade project"));
   ide_layout_view_set_icon_name (IDE_LAYOUT_VIEW (self), "glade-symbolic");