Make the KoUnitDoubleSpinBox work again.
Cleanup the class by adding a d-pointer, removing all implementation in the header file. Merging 3 classes into one and removing some widgets that nobody used anyway. Renamed the file to the class name, and follow that rename in all classes. I made the constructor with the many many arguments deprecated, according to kde-wide policy of going with small constructors (enhances readability of code) The validator() has plenty of room for improvement left, btw ;) svn path=/trunk/koffice/; revision=685709
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