tdf#119266: Nodes don't expand on double click in the Customize dialog

Change-Id: I8b6667dc631df2fd38a8a2d99668b4a2336801b6
Reviewed-on: https://gerrit.libreoffice.org/61504
Tested-by: Jenkins
Reviewed-by: Muhammet Kara <muhammet.kara@pardus.org.tr>

cui/source/customize/cfg.cxx

@@ -1752,8 +1752,12 @@ IMPL_LINK( SvxConfigPage, MoveHdl, Button *, pButton, void )
 IMPL_LINK_NOARG( SvxConfigPage, FunctionDoubleClickHdl, SvTreeListBox *, bool )
 {
     if ( m_pAddCommandButton->IsEnabled() )
+    {
         m_pAddCommandButton->Click();
         return false;
+    }
+    else
+        return true;
 }
 
 IMPL_LINK_NOARG( SvxConfigPage, SelectFunctionHdl, SvTreeListBox *, void )