Major Preview Bug with Dolphin/Konqueror

[Kelly Miller]

It's probably already been reported (I can't see something like THIS 
being missed for long), but uh...

If you hover over a file in the bottom right corner, the preview window 
is literally off the screen, due to it always putting the top left 
corner of the preview window where the mouse is.  Probably a good idea 
to switch that up depending on distance to the edge of the screen ;)