Better keyboard support for dialogs

[bilogic]

Feature Description

In a dialog such as this, the primary button should accept Enter key and Escape key for other

Screenshots

[wxiaoguang]

Not that difficult to support it. We have already customized the "modal dialog" a lot.

[a1012112796]

looks in fact it was disabled in the code, wonder why?

[wxiaoguang]

looks in fact it was disabled in the code, wonder why?

No reason, that's copy&pasted code since 2015 dc4aab99

And the .delete-button is a wrong design and shouldn't be used any more.

  // ".delete-button" shows a confirmation modal defined by `data-modal-id` attribute.
  // Some model/form elements will be filled by `data-id` / `data-name` / `data-data-xxx` attributes.
  // If there is a form defined by `data-form`, then the form will be submitted as-is (without any modification).
  // If there is no form, then the data will be posted to `data-url`.
  // TODO: it's not encouraged to use this method. `show-modal` does far better than this.