PortfolioListView: Add column with balance of reference account

Thus, portfolio list view will now have complete information: securities
account and its MTM balance, and reference account with its cash balance.

name.abuchen.portfolio.ui/src/name/abuchen/portfolio/ui/views/PortfolioListView.java

@@ -2,6 +2,8 @@
 
 import java.text.MessageFormat;
 import java.time.LocalDate;
+import java.time.LocalDateTime;
+import java.time.LocalTime;
 import java.util.List;
 
 import jakarta.annotation.PostConstruct;
@@ -256,6 +258,23 @@ public String getText(Object element)
         }));
         portfolioColumns.addColumn(column);
 
+        column = new Column("ref_cash_bal", "Balance of reference account", SWT.RIGHT, 100); //$NON-NLS-1$
+        column.setLabelProvider(new ColumnLabelProvider()
+        {
+            CurrencyConverter converter = new CurrencyConverterImpl(factory, getClient().getBaseCurrency());
+
+            @Override
+            public String getText(Object element)
+            {
+                Portfolio p = (Portfolio) element;
+                var refAcc = p.getReferenceAccount();
+                return Values.Amount.format((refAcc.getCurrentAmount(LocalDateTime.now().with(LocalTime.MAX))));
+            }
+        });
+        ColumnViewerSorter.create(o -> ((Portfolio) o).getReferenceAccount().getCurrentAmount(LocalDateTime.now().with(LocalTime.MAX)))
+                        .attachTo(column);
+        portfolioColumns.addColumn(column);
+
         column = new NoteColumn();
         column.getEditingSupport().addListener(this);
         portfolioColumns.addColumn(column);