[gnome-music/wip/jfelder/remove-margin-left-right: 16/19] appmenu: Remove margin property usage

[Jean Felder <jfelder src gnome org>]

commit 635b6633df69a90edacb39430cfd9e11f85ba701
Author: Jean Felder <jfelder src gnome org>
Date:   Mon Mar 15 12:32:01 2021 +0100

    appmenu: Remove margin property usage
    
    This property does not exist in Gtk4.
    Use margin-bottom, margin-end, margin-start and margin-top
    properties.

 data/ui/AppMenu.ui | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/data/ui/AppMenu.ui b/data/ui/AppMenu.ui
index bbf2f675e..127544592 100644
--- a/data/ui/AppMenu.ui
+++ b/data/ui/AppMenu.ui
@@ -8,7 +8,10 @@
       <object class="GtkBox">
         <property name="visible">True</property>
         <property name="can_focus">False</property>
-        <property name="margin">6</property>
+        <property name="margin-bottom">6</property>
+        <property name="margin-end">6</property>
+        <property name="margin-start">6</property>
+        <property name="margin-top">6</property>
         <property name="orientation">vertical</property>
         <child>
           <object class="GtkModelButton" id="lastfm_account_button">