Fix include paths, compilation errors, linker errors for insertRow/insertChild/removeRow, and DbUtils include path. BudgetPro now builds successfully.

src/gui/forms/formproduct.h

@@ -43,6 +43,7 @@ private slots:
 private:
     Ui::formProduct *ui;
     bool editMode;
+    QStringList insertedElementCodes;
 
     void CalculatePrice();
     bool InsertElement(QString ID, QModelIndex index);
@@ -52,4 +53,4 @@ private:
     void setComposeElement(bool val);
 };
 
-#endif // FORMPRODUCT_H
+#endif // FORMPRODUCT_H