[KimDaBa] Viewer improvement

[Franz Graf]

Hello Jesper,

What I would really like to see in kimdaba is the option to define the viewer 
size as maximum rather than fixed width x height. Smaller images should 
(alternatively) be shown in their original size instead of being scaled by 
e.g. 1.07, which makes them just look terrible. Images larger than the 
maximum size should be downscaled. Is it possible to implement this feature?

Best regards,
Franz Graf