Put the scrollbar on the left when in Arabic mode.

In the list of suras, juzs, and bookmarks, the scroller for the
list should be on the left if we're using arabic and on the right
otherwise.
Uyghur translation, added missing translation.
Merge pull request #360 from Sahran/master

Uyghur translation, added missing translation.
Fix bookmark refresh and image download bugs.

- bookmarks and tags now properly refresh.
- fix a bug when loading an image after downloading it the first time.