Added Column dialog for selecting visible columns. Selection is stored to settings.

core/columndialog.h

@@ -0,0 +1,28 @@
+#ifndef COLUMNDIALOG_H
+#define COLUMNDIALOG_H
+
+#include <QDialog>
+#include <QObject>
+#include <QTableView>
+#include <QList>
+
+namespace Ui {
+class ColumnDialog;
+}
+
+class ColumnDialog : public QDialog
+{
+    Q_OBJECT
+
+public:
+    explicit ColumnDialog(QWidget *parent = 0);
+    ~ColumnDialog();
+
+    void setTable(QTableView *table);
+    QList<int> columnsToHide();
+
+private:
+    Ui::ColumnDialog *ui;
+};
+
+#endif // COLUMNDIALOG_H