Automatic switching single/double page based on page orientation

[Tuxrug]

Would it be possible to add an option to automatically switch between single and double-page view modes? I typically use double-page but some comics I prefer single page except for occasional split pages.

Rather than switching view modes manually, can the webUI use single-page view when the window is tall or mobile device is in portrait orientation, and switch to double-page when the window is wide or device is in landscape?

[gotson]

duplicate of #1532