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

[Guido Günther <guidog src gnome org>]

commit 13380c161f28750f2bff84dd77c187759b696d2e
Author: Guido Günther <agx sigxcpu org>
Date:   Thu Oct 13 17:35:09 2022 +0200

    window: Use margin-* instead of margin
    
    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 3ababfa..73cbe07 100644
--- a/src/resources/ui/ka-main-window.ui
+++ b/src/resources/ui/ka-main-window.ui
@@ -6,7 +6,10 @@
     <child>
       <object class="GtkBox">
         <property name="visible">True</property>
-        <property name="margin">10</property>
+        <property name="margin-start">10</property>
+        <property name="margin-top">10</property>
+        <property name="margin-bottom">10</property>
+        <property name="margin-end">10</property>
        <property name="orientation">vertical</property>
         <child>
           <object class="GtkModelButton">