split Timedisplay into a common class and a specialised class and make
new SmallTimeDisplay inherit from the common class. Thus as much code as
possible is reused in SmallTimeDisplay
If the playtime is bigger or equal to 100 minutes, timedisplay shows
hours and minutes now, if playtime is bigger or equal to 100 hours,
timedisplay gives up and only showes '--:--'
Moved positions and sizes of close and shade buttons to Skin
changed buttons to use PixmapButton
moved buttons from PlaylistWindow to PlaylistWidget and PlaylistShade
removed now unused Button
fixed position of shadebutton (was off by 1)
fixed icon of shade button in shaded mode
The playlistscrollbar is now also visible if the playlist was open on
program start.
Also fixed grapics glitches in small numbers after Skin change
Updated dependencies in README (because of API change in
broadcastCurrentPos)
Use the new PixmapSlider class which is based on Qt's AbstractSlider
class for sliders. This should also fix some offset problems in
PositionSlider which appeared after the introduction of the new Button
class
Use PixmapButton in most cases insteas of Button or ToggleButton
Moved positions and sizes of the buttons to Skin and let it return QIcons instead of Pixmaps
