[gnome-control-center] online-accounts: Improve dialog content margins

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit bd527d44c176a63907decd4348450dfd45af2040
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Thu Feb 16 15:21:10 2017 -0200

    online-accounts: Improve dialog content margins
    
    More alignment issues.

 panels/online-accounts/online-accounts.ui |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/panels/online-accounts/online-accounts.ui b/panels/online-accounts/online-accounts.ui
index 756f095..5727c11 100644
--- a/panels/online-accounts/online-accounts.ui
+++ b/panels/online-accounts/online-accounts.ui
@@ -251,7 +251,9 @@
                     <property name="can_focus">False</property>
                     <property name="vexpand">True</property>
                     <property name="orientation">vertical</property>
-                    <property name="spacing">12</property>
+                    <property name="margin-start">18</property>
+                    <property name="margin-end">18</property>
+                    <property name="spacing">18</property>
                   </object>
                 </child>
                 <child>