QETProject have is own database + add widget to edit nomenclature model

QETProject have is own ProjectDataBase, then when the database is
updated, everything that need the database is also updated trough the
signal emitted by the database.
Begin a widget to edit the NomenclatureModel

sources/qetgraphicsitem/ViewItem/nomenclaturemodel.h

@@ -20,8 +20,6 @@
 
 #include <QAbstractTableModel>
 #include <QPointer>
-#include "projectdatabase.h"
-
 
 class QETProject;
 
@@ -45,10 +43,12 @@ class NomenclatureModel : public QAbstractTableModel
 		QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
 		void query(const QString &query);
 
+	private:
+		void dataBaseUpdated();
+
 	private:
 		QPointer<QETProject> m_project;
 		QString m_query;
-		projectDataBase m_database;
 		QVector<QStringList> m_record;
 		QHash<int, QHash<int, QVariant>> m_header_data;
 		QHash<int, QVariant> m_index_0_0_data;