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/ColumnPage.h

@@ -11,7 +11,7 @@ class PgLabTableView;
 class SqlCodePreview;
 class PgDatabaseCatalog;
 class ColumnTableModel;
-class CustomFilterSortModel;
+class QSortFilterProxyModel;
 class QItemSelection;
 class QAbstractItemModel;
 
@@ -31,7 +31,7 @@ private:
 	PgLabTableView *m_tableView = nullptr;
 	SqlCodePreview *m_definitionView = nullptr;
 	ColumnTableModel *m_columnModel = nullptr;
-	CustomFilterSortModel *m_sortFilterProxy = nullptr;
+	QSortFilterProxyModel *m_sortFilterProxy = nullptr;
 	std::shared_ptr<const PgDatabaseCatalog> m_catalog;
 	std::optional<PgClass> m_Class;