PATCH: KdmClock background fix & cleanup (embedded in greeter)

[Hans Meine]

Hi!

Today I ran kdm with the marble style and the embedded clock was
painted in black on black.. ;-/

So I came up with the attached patch which basically uses
backgroundBrush() instead of backgroundColor(). Looking at the code
again after some time, I found som minor items I cleaned up:

- a useless function: initialize()
- two unused member vars (fore-/background colors)
- a useless member function (mTime)

If noone objects, I'd like to commit the bigger(*) of the attached
patches which also fixes those things.

-- 
Ciao,  /  /
      /--/
     /  / ANS

*: "bigger" is relative.. ;-)

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