[krb5-auth-dialog] main-window: Use hide-on-close property

[Guido Günther <guidog src gnome org>]

commit 1c5a5b3aa2f89b7fc2f28076b4f786793ec2074b
Author: Guido Günther <agx sigxcpu org>
Date:   Mon Oct 17 10:21:04 2022 +0200

    main-window: Use hide-on-close property
    
    Much simpler.

 src/ka-main-window.c               | 8 --------
 src/ka-main-window.h               | 2 --
 src/resources/ui/ka-main-window.ui | 2 +-
 3 files changed, 1 insertion(+), 11 deletions(-)
---
diff --git a/src/ka-main-window.c b/src/ka-main-window.c
index 60be3fb..1ea70ee 100644
--- a/src/ka-main-window.c
+++ b/src/ka-main-window.c
@@ -87,7 +87,6 @@ on_row_deleted(GtkTreeModel *model,
 }
 
 
-
 GtkApplicationWindow *
 ka_main_window_create (KaApplet *applet)
 {
@@ -219,10 +218,3 @@ ka_main_window_show (KaApplet *applet)
         gtk_widget_show (message_dialog);
     }
 }
-
-void
-ka_main_window_hide (void)
-{
-    KA_DEBUG("Hiding main window");
-    gtk_widget_hide (GTK_WIDGET(main_window));
-}
diff --git a/src/ka-main-window.h b/src/ka-main-window.h
index fba17ee..a3ceb28 100644
--- a/src/ka-main-window.h
+++ b/src/ka-main-window.h
@@ -35,7 +35,5 @@ enum ticket_columns {
 
 GtkApplicationWindow *ka_main_window_create (KaApplet *applet);
 void ka_main_window_show (KaApplet *applet);
-void ka_main_window_hide (void);
-
 
 #endif
diff --git a/src/resources/ui/ka-main-window.ui b/src/resources/ui/ka-main-window.ui
index d68dbc8..75c3c58 100644
--- a/src/resources/ui/ka-main-window.ui
+++ b/src/resources/ui/ka-main-window.ui
@@ -50,7 +50,7 @@
   <object class="GtkApplicationWindow" id="krb5_main_window">
     <property name="title" translatable="yes">Service Tickets</property>
     <property name="default-width">700</property>
-    <signal name="delete-event" handler="ka_main_window_hide" swapped="no"/>
+    <property name="hide-on-close">True</property>
     <child>
       <object class="GtkStack" id="stack">
         <property name="visible">True</property>