Implemented a custom delegate that does the samework as the BaseTableModel class did.

While this might seem to duplicate behaviour I believe having this code in a delegate
is a better solution.
- the logic in BaseTableModel is view logic not model logic
- letting the custom delegate determine the formatting is much more efficient
  then letting the default delegate do many virtual calls to detemine how the
  model wants it formatted.

pglab/PgLabItemDelegate.h

@@ -0,0 +1,18 @@
+#ifndef PGLABITEMDELEGATE_H
+#define PGLABITEMDELEGATE_H
+
+#include <QStyledItemDelegate>
+
+class PgLabItemDelegate : public QStyledItemDelegate
+{
+public:
+	PgLabItemDelegate(QObject *parent = nullptr);
+
+	virtual void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const override;
+
+protected:
+	virtual void initStyleOption(QStyleOptionViewItem *option, const QModelIndex &index) const override;
+
+};
+
+#endif // PGLABITEMDELEGATE_H