Add "select all" to column header menu

Author: parg

uis/src/com/biglybt/ui/swt/views/table/impl/TableViewSWT_Common.java

@@ -1221,7 +1221,7 @@ public void run(TableRowCore row) {
 			menuHideColumn.addListener(SWT.Selection,
 					e -> TableColumnSWTUtils.changeColumnVisiblity(tv, column, false));
 		}
-
+		
 		final MenuItem itemResetColumns = new MenuItem(menu, SWT.PUSH);
 		Messages.setLanguageText(itemResetColumns, "table.columns.reset");
 		itemResetColumns.addListener(SWT.Selection, new Listener() {
@@ -1250,6 +1250,12 @@ public void prompterClosed(int result) {
 			}
 		});
 
+		final MenuItem itemSelectAll = new MenuItem(menu, SWT.PUSH);
+		Messages.setLanguageText(itemSelectAll, "Button.selectAll");
+		itemSelectAll.addListener(SWT.Selection, (ev)->{
+			tv.selectAll();
+		});
+
 		final MenuItem itemChangeTable = new MenuItem(menu, SWT.PUSH);
 		Messages.setLanguageText(itemChangeTable,
 				"MyTorrentsView.menu.editTableColumns");