[evolution] I#1900 - iTIP formatter shows twice "Attendee status updated"

[Milan Crha <mcrha src gnome org>]

commit 3e77eaafc0695da27dab18c1e9ba0a7e309c9292
Author: Milan Crha <mcrha redhat com>
Date:   Tue May 10 17:40:34 2022 +0200

    I#1900 - iTIP formatter shows twice "Attendee status updated"
    
    Closes https://gitlab.gnome.org/GNOME/evolution/-/issues/1900

 src/modules/itip-formatter/itip-view.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)
---
diff --git a/src/modules/itip-formatter/itip-view.c b/src/modules/itip-formatter/itip-view.c
index 853dad38e8..febd8c2279 100644
--- a/src/modules/itip-formatter/itip-view.c
+++ b/src/modules/itip-formatter/itip-view.c
@@ -198,6 +198,8 @@ struct _ItipViewPrivate {
        gboolean state_keep_alarm_check;
        gboolean state_inherit_alarm_check;
        gint state_response_id;
+
+       gboolean attendee_status_updated;
 };
 
 enum {
@@ -3891,9 +3893,12 @@ set_buttons_sensitive (ItipView *view)
 
        if (enabled && itip_view_get_mode (view) == ITIP_VIEW_MODE_REPLY &&
            view->priv->comp && same_attendee_status (view, view->priv->comp)) {
-               itip_view_add_lower_info_item (
-                       view, ITIP_VIEW_INFO_ITEM_TYPE_INFO,
-                       _("Attendee status updated"));
+               if (!view->priv->attendee_status_updated) {
+                       view->priv->attendee_status_updated = TRUE;
+                       itip_view_add_lower_info_item (
+                               view, ITIP_VIEW_INFO_ITEM_TYPE_INFO,
+                               _("Attendee status updated"));
+               }
 
                enable_button (view, BUTTON_UPDATE_ATTENDEE_STATUS, FALSE);
        }
@@ -5592,6 +5597,7 @@ modify_object_cb (GObject *ecalclient,
 
        } else {
                update_item_progress_info (view, NULL);
+               view->priv->attendee_status_updated = TRUE;
                itip_view_add_lower_info_item (
                        view, ITIP_VIEW_INFO_ITEM_TYPE_INFO,
                        _("Attendee status updated"));