[KPhotoAlbum] Image load optimizations

[Johannes Zarl-Zierl]

Am Freitag, 25. Oktober 2019, 18:26:53 CET schrieb Robert Krawitz:
> I've added UI elements for the image load parameters.
> 
> Note that this is experimental.  Also, the detail parameters don't
> take effect unless you set the load optimization preset to Manual.

To my shame I didn't come around to testing your patch yet. One thought about 
the settings data, though: shouldn't we store the settings on a per-database 
basis?

Cheers,
  Johannes