Version 2.15.91
---------------
- Small fixes on error dialog (Lucas Rocha)
- Fix memory leak on image transformation (Felix Riemman) [349434]
- Fix typo on UI message (Lucas Rocha) [349361]
- Panning around the image with arrows on fullscreen mode 
  (Lucas Rocha) [347174] 
- Updated translations: Hendrik Richter (de), Francisco Javier F. 
  Serrador (es), Christophe Merlet (fr), Maxim Dziumanenko (uk),
  Jovan Naumovski (mk), Bastien Nocera (en_GB), Theppitak 
  Karoonboonyanan (th), Ankit Patel (gu), Jakub Friedl (cs)