Solve FR [ 1843854 ] Creating fields on dispose (performance)

base/src/org/compiere/model/GridTab.java

@@ -240,7 +240,8 @@ public class GridTab implements DataStatusListener, Evaluatee, Serializable
 			m_Chats.clear();
 		m_Chats = null;
 		//
-		m_vo.getFields().clear();
+		if (m_vo.isInitFields())
+			m_vo.getFields().clear();
 		//m_vo.Fields = null;
 		m_vo = null;
 		if (m_loader != null)

base/src/org/compiere/model/GridTabVO.java

@@ -546,5 +546,11 @@ public class GridTabVO implements Evaluatee, Serializable
 		return clone;
 	}	//	clone
 
-}   //  MTabVO
+	/**
+	 * @return the initFields
+	 */
+	public boolean isInitFields() {
+		return initFields;
+	}
 
+}   //  MTabVO