Updated russian translation.
Merge pull request #72 from ashtuchkin/update-russian-locale

Updated Russian translation.
square previews and some fixes in file list view
file and error icons
better file list scroll
better file list scroll with less code
text in multiple preview footer
Merge branch 'master' into multiupload

* master:
  Updated russian translation.
loading circle in preview tab button
open dialog with same files after error