tdf#73071 Fix minor spacing issue in style section

Change-Id: Ied562af293a4e970b9963f566d85a79375737954
Reviewed-on: https://gerrit.libreoffice.org/18221Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

svx/uiconfig/ui/sidebarstylespanel.ui

@@ -54,7 +54,6 @@
           <object class="GtkBox" id="box3">
             <property name="visible">True</property>
             <property name="can_focus">False</property>
-            <property name="margin_right">6</property>
             <child>
               <object class="sfxlo-SidebarToolBox" id="styleupdate">
                 <property name="visible">True</property>