- Atom name updated
- Plasma dashboard now sets own window class
- KWin now detects dashboard by its window class (no more hacks)
- removed magic number for blur effect, moved to kwineffects and changed in blur effect, too
- call reconfigure() in effect CTOR instead of duplicating code
- implemented DTOR
- brightness/saturation values are now handled as percentage
- fixed blur region
- removed german translation in .desktop files

This patch adds a new KWin effect that allows to modify the appearance of the Plasma dashboard. It has a KCM configuration dialog where you can adjust brightness, saturation and blur of the dashboard background. Blur depends on the loaded blur plugin.

I also patched the Plasma dashboard to recognize the loaded effect: If the effect is loaded, the dashboard draws its background fully translucent. In order for the Dashboard to recognize wether the effect is loaded, I added support for the effect in Plasma::WindowEffects from kdelibs.

The dashboard detection in the effect itself is hackish right now. As soon as Plasma adds a proper class to the dashboard window, I will replace the hack with a class-check.

Code compiles, plugin loads, plugin configuration dialog is registered in KCM Workspace module under "all effects". If the plugin is enabled, its settings apply to the dashboard.