erp5_accounting: Include mirror_section_uid in section_uid index.

Accelerates (at least) Person's jump_to_accounting action.

bt5/erp5_accounting/CatalogMethodTemplateItem/portal_catalog/erp5_mysql_innodb/z_create_accounting_transaction.xml

@@ -79,7 +79,7 @@
   `total_credit` real,\n
 \n
   PRIMARY KEY (`uid`, `order_id`),\n
-  KEY `section_uid` (`section_uid`)\n
+  KEY (`section_uid`, `mirror_section_uid`)\n
   -- TODO: keys\n
 ) ENGINE=InnoDB\n
 </string> </value>

bt5/erp5_accounting/bt/revision

-1567
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+1568
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