Query can be edited. Project database can be exported

User can now define the information to display in the nomenclature
table. WIP
The internal database of project can be exported to file.

sources/ui/bomexportdialog.h

@@ -54,13 +54,12 @@ class BOMExportDialog : public QDialog
         void on_m_save_current_conf_pb_clicked();
         void on_m_load_pb_clicked();
 
-		private:
+	private:
         void setUpItems();
         QString getBom();
         QString headers() const;
         bool createDataBase();
         void populateDataBase();
-        void prepareQuery(QStringList keys);
         QHash<QString, QString> elementInfoToString(Element *elmt) const;
         QString queryStr() const;
         void updateQueryLine();