[gnome-flashback] monitor-manager: only manage orientation if we have a built in panel

[Alberts Muktupāvels <muktupavels src gnome org>]

commit fe9f5fb7efcc3f87cd22a5800009e131f02dd81e
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Sun Sep 12 23:26:00 2021 +0300

    monitor-manager: only manage orientation if we have a built in panel
    
    Based on mutter commit:
    https://gitlab.gnome.org/GNOME/mutter/-/commit/e976137d9780

 backends/gf-monitor-manager.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/backends/gf-monitor-manager.c b/backends/gf-monitor-manager.c
index dee146f..b5ba560 100644
--- a/backends/gf-monitor-manager.c
+++ b/backends/gf-monitor-manager.c
@@ -664,7 +664,8 @@ update_panel_orientation_managed (GfMonitorManager *self)
   priv = gf_monitor_manager_get_instance_private (self);
 
   orientation_manager = gf_backend_get_orientation_manager (priv->backend);
-  panel_orientation_managed = gf_orientation_manager_has_accelerometer (orientation_manager);
+  panel_orientation_managed = gf_orientation_manager_has_accelerometer (orientation_manager) &&
+                              gf_monitor_manager_get_laptop_panel (self);
 
   if (self->panel_orientation_managed == panel_orientation_managed)
     return;
@@ -1187,6 +1188,8 @@ rebuild_monitors (GfMonitorManager *manager)
             }
         }
     }
+
+  update_panel_orientation_managed (manager);
 }
 
 static GList *