On mobile devices, when the "Mark as watched" phrase disappears from the Watchlist and only the checkmark remains (see: http://cl.ly/1T2Q253c3Y2U), it's incredibly difficult to tap on the first try because the target is so small.
There are probably a million ways to make this better, but a minor change, such as adding a `display:block;` rule to the checkmark when the "Mark as watched" phrase is hidden, may go a long way here to make this more usable on small screens.
Thanks for making an awesome service!
