Pocket has released a minor update to its iOS offline reading app adding several improvements and refinements to the major 4.0 release from earlier this year. Pocket 4.1 now supports the Dark Theme throughout the app rather than merely in the article view and adds a new Sepia theme with a focus on contrast and readability; the maximum font size has also been increased in the article view. Users can also now swipe left or right to enable a books-style…