FIX missing setup of extrafields for MO

FIX all extrafields cleared after update of one of them
FIX Update of extrafields date
FIX Update of extrafiels on draft object
FIX Sql type
Fix trans on BOM

htdocs/modulebuilder/template/class/myobject.class.php

@@ -33,12 +33,12 @@ require_once DOL_DOCUMENT_ROOT.'/core/class/commonobject.class.php';
 class MyObject extends CommonObject
 {
 	/**
-	 * @var string ID to identify managed object
+	 * @var string ID to identify managed object.
 	 */
 	public $element = 'myobject';
 
 	/**
-	 * @var string Name of table without prefix where object is stored
+	 * @var string Name of table without prefix where object is stored. This is also the key used for extrafields management.
 	 */
 	public $table_element = 'mymodule_myobject';