private void ChkSelectAll_Toggled(object?sender, EventArgs e)
{
GtkHelper.ListStoreForEach(this.listStore, iter =>
{
this.listStore.SetValue(iter, 0, ChkSelectAll.Active);
var ent = (EntryWrapper)this.listStore.GetValue(iter, 5);
ent.Selected = ChkSelectAll.Active;
});
}