Ability to add from the first to an arbitrary episode as watched

[EmmanuelMess]

Description

Ability to add from the first to an arbitrary episode (say, 5th episode of season 7) as watched.

Steps to Reproduce

1. Open series

2. Select episode

3. • a:

     • Press watched button
     • On a popup menu, select "All up to this one" (as opposed to "Only this one")

   • b:

     • Select the button to the right of the little eye (should only appear if user selects the episode, if user doesn't the button should remain as it is now) (the button in question would be similar to the download button of Android, but thinner than the eye)