Removes unnecessary padding above message dialog headings. This
makes the dialogs look much more balanced.
https://bugzilla.gnome.org/show_bug.cgi?id=732857
https://bugzilla.gnome.org/show_bug.cgi?id=732882
<object class="GtkLabel" id="label">
<property name="visible">True</property>
<property name="can_focus">False</property>
- <property name="margin-top">10</property>
<property name="halign">center</property>
<property name="valign">start</property>
<property name="wrap">True</property>