DoubleClick event in TabControl

[KeeP]

Hi.

Recently, i wanna add a feature: when double click on one `TabPage`, the `TabPage` will be colsed.

Then i found that `Eto.Form TabControl's  DoubleClick` event is not the same as `WinForm TabControl's  DoubleClick`.

In WinForm, `DoubleClick` event would happen only when you double click on `TabPage` title.

In Eto.Form, `DoubleClick` event was captured by `ApplicationHandler`, and not for other processing.

Could you help me?Thanks.