Instead of shuffling all pictures of a slideshow 1.4 Pre Release selects a picture at random when the next picture is to be selected. This results in pictures being repeated and others to be omitted.

Correct behaviour is to shuffle all available pictures and to show them in this new random order without omissions or duplicates (either shuffle the list or shuffle a list of numbers and select from that, shuffling for recursive should probably be per folder as loading all folders will probably take too long).

h4. Steps to Reproduce
Set slide show to random (without repeating for best visibility of the issue)
Navigate to a folder containing few pictures (to see the issue easier)
Start Slide Show
See that pictures are repeated and others omitted

h4. Additional Information
1.3 does this correctly