#439 Record and display changes in the link sets (ex: Members of a team)

#439 Make sure that changes made by a plugin get recorded
+ simplified the change tracking for the plugins. Simply call DBObject::DBInsert (resp. Update and Delete) and the change will be recorded for the current page. This is compatible with the old (not mandatory anymore) way that was requiring DBInsertTracked APIs (resp. Update, Delete).

SVN:trunk[2236]

core/attributedef.class.inc.php

@@ -75,6 +75,18 @@ define('DEL_SILENT', 2);
 define('DEL_MOVEUP', 3);
 
 
+/**
+ * For Link sets: tracking_level
+ *
+ * @package     iTopORM
+ */
+define('LINKSET_TRACKING_NONE', 0); // Do not track changes in the link set
+define('LINKSET_TRACKING_LIST', 1); // Do track added/removed items
+define('LINKSET_TRACKING_DETAILS', 2); // Do track modified items
+define('LINKSET_TRACKING_ALL', 3); // Do track added/removed/modified items
+
+
+
 /**
  * Attribute definition API, implemented in and many flavours (Int, String, Enum, etc.) 
  *
@@ -567,6 +579,11 @@ class AttributeLinkedSet extends AttributeDefinition
 		}
 	}
 
+	public function GetTrackingLevel()
+	{
+		return $this->GetOptional('tracking_level', LINKSET_TRACKING_LIST);
+	}
+
 	public function GetLinkedClass() {return $this->Get('linked_class');}
 	public function GetExtKeyToMe() {return $this->Get('ext_key_to_me');}
 
@@ -855,6 +872,11 @@ class AttributeLinkedSetIndirect extends AttributeLinkedSet
 	public function GetExtKeyToRemote() { return $this->Get('ext_key_to_remote'); }
 	public function GetEditClass() {return "LinkedSet";}
 	public function DuplicatesAllowed() {return $this->GetOptional("duplicates", false);} // The same object may be linked several times... or not...
+
+	public function GetTrackingLevel()
+	{
+		return $this->GetOptional('tracking_level', LINKSET_TRACKING_ALL);
+	}
 }
 
 /**