* Automatic add a function argument if the user has enabled parameter values.
* Added a checkbock for disable parameter values.
* Cleaned EditFunction a bit, don't load the parameter values twice.

In KParameterEditor:
* When editing a value, the current value is shown as default.
* Don't allow duplicated values when adding, editing or importing new ones.
* Fixed the tooltips and whatsthis for the widgets.

CCMAIL:kdmoeller@foni.net
CCMAIL:bmlmessmer@web.de

svn path=/trunk/kdeedu/kmplot/; revision=325837