Todo:
o new: system sounds at thumbnail 
o fix: several crashes in thumbnailmanager class 
o excluding windows


0.7
o fix: transparency on nontransparent kicker
o fix: 'on mouse hover and click' works again
o new: semitransparent buttons
o new: application exclude list for screenshots (usage:  "className,windowRole;className,windowRole [..]")


0.6
o fix: definitely flicker free
o fix: textcolor, now guaranteed readibility 
o new: thumbnail will hide itself after 5 seconds (tool tip behaviour)  
o new: apply icon effects (eg. toGray)

0.5
o fix: transparency will work now! (and without flicker)
o fix: nicer shadow 
 

0.4
o new: shadows around text vs. text color
o new: smooth effects when blending in buttons 
o fix: thumbnail flicker reduction 
o fix: button flickers at window moving



0.3 - done 

o cleaner animations, animation follows KControl 
o disable animation if popupp was opened
o configuration: show buttons/ show thumbnails



