Version 2.31.90
---------------

  * Draw images against black background by default to gain a 
    better contrast (Felix Riemann)
  * Backport UI elements from master to change background color (Felix Riemann)
  * Code improvements (Claudio Saavedra, Felix Riemann)

Bug fixes:

  #616450, Use a nicer background colour (Felix Riemann)
  #625325, Useless Yes/No question (Felix Riemann)
  #626569, Button bar appears when deleting in fullscreen (Felix Riemann)

New and updated translations:

- Jorge González [es]
- Ivar Smolin [et]
- Claude Paroz [fr]
- Fran Dieguez [gl]
- Yaron Shahrabani [he]
- Andika Triwidada [id]
- Kjartan Maraas [nb]
- A S Alam [pa]
- Matej Urbančič [sl]
- Милош Поповић [sr]
- Miloš Popović [sr@latin]
- Daniel Nylander [sv]
- Yinghua Wang [zh_CN]