setClosable(false);
this.editor = editor;
// create groups table
List<TableColumn> columns = new ArrayList<TableColumn>();
TableColumn cbox = new CheckBoxTableColumn("mem_check");
columns.add(cbox);
TableColumn col = new TableColumn("Group", constants.group(), 150);
col.setMinWidth(75);
col.setMaxWidth(300);
columns.add(col);
col = new TableColumn("Roles", constants.roles(), 320);
col.setAlignment(HorizontalAlignment.LEFT);
col.setMaxWidth(480);
columns.add(col);
col = new TableColumn("Description", constants.description(), 800);
col.setMaxWidth(800);
col.setAlignment(HorizontalAlignment.LEFT);
columns.add(col);
TableColumnModel cm = new TableColumnModel(columns);
groupTable = new Table(cm);