Add min & max in selection to the status bar and always show rows & columns

Now number of rows and columns is always showed, independent of the number
of cells threshold. Plural forms are used in translations (Spanish and
British English updated for testing).

Min and Max have also been added to the status bar message.

src/MainWindow.cpp

@@ -62,6 +62,8 @@
     #include <QOpenGLWidget>
 #endif
 
+#include <limits>
+
 const int MainWindow::MaxRecentFiles;
 
 // These are needed for reading and writing object files
@@ -723,18 +725,28 @@ void MainWindow::populateTable()
             updateInsertDeleteRecordButton();
 
             const QModelIndexList& sel = ui->dataTable->selectionModel()->selectedIndexes();
-            if (sel.count() > 1 && sel.count() < Settings::getValue("databrowser", "complete_threshold").toInt()) {
+            QString statusMessage;
+            if (sel.count() > 1) {
                 int rows = sel.last().row() - sel.first().row() + 1;
+                statusMessage = tr("%n row(s)", "", rows);
                 int columns = sel.last().column() - sel.first().column() + 1;
-                double sum = 0;
-                for (const QModelIndex& index : sel) {
-                    QVariant data = m_browseTableModel->data(index, Qt::EditRole);
-                    sum += data.toDouble();
+                statusMessage += tr(", %n column(s)", "", columns);
+
+                if (sel.count() < Settings::getValue("databrowser", "complete_threshold").toInt()) {
+                    double sum = 0;
+                    double first = m_browseTableModel->data(sel.first(), Qt::EditRole).toDouble();
+                    double min = first;
+                    double max = first;
+                    for (const QModelIndex& index : sel) {
+                        double data = m_browseTableModel->data(index, Qt::EditRole).toDouble();
+                        sum += data;
+                        min = std::min(min, data);
+                        max = std::max(max, data);
+                    }
+                    statusMessage += tr(". Sum: %1; Average: %2; Min: %3; Max: %4").arg(sum).arg(sum/sel.count()).arg(min).arg(max);
                 }
-                ui->statusbar->showMessage(QString("%1 rows, %2 columns. Sum: %3. Average: %4").arg(rows).arg(columns).arg(sum).
-                                           arg(sum/sel.count()));
-            } else
-                ui->statusbar->showMessage(QString());
+            };
+            ui->statusbar->showMessage(statusMessage);
         });
     }
     // Search stored table settings for this table