Collection of small fixes and improvements

- Selections stay clearly visible when focus changes to other widget
- Autoresize columns
- Table properties view now correctly allows selection in both columns and draws selection correctly
- Tables can be sorted again and now by any column

pglab/PgLabTableView.h

@@ -3,10 +3,13 @@
 
 #include <QTableView>
 
+class QSortFilterProxyModel;
+
 class PgLabTableView : public QTableView {
 	Q_OBJECT
 public:
 	explicit PgLabTableView(QWidget *parent = nullptr);
+
 };
 
 #endif // PGLABTABLEVIEW_H