[krb5-auth-dialog] window: Use margin instead of border-width

[Guido Günther <guidog src gnome org>]

commit bd2ab3e01b3a2847c50f512fa94a084052e88843
Author: Guido Günther <agx sigxcpu org>
Date:   Thu Oct 13 17:35:11 2022 +0200

    window: Use margin instead of border-width
    
    The later doesn't exist in GTK4

 src/resources/ui/ka-main-window.ui | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/src/resources/ui/ka-main-window.ui b/src/resources/ui/ka-main-window.ui
index 16b1a3f..74e9485 100644
--- a/src/resources/ui/ka-main-window.ui
+++ b/src/resources/ui/ka-main-window.ui
@@ -55,7 +55,10 @@
     <child>
       <object class="GtkStack" id="stack">
         <property name="visible">True</property>
-        <property name="border_width">5</property>
+        <property name="margin-bottom">5</property>
+        <property name="margin-end">5</property>
+        <property name="margin-start">5</property>
+        <property name="margin-top">5</property>
         <property name="transition_type">slide-down</property>
         <child>
           <object class="GtkTreeView" id="krb5_tickets_treeview">