* Strange label on the "edit plot function"-dialog
* Check the max- and minvalue in polar and parametric dialog.
* Prevent to edit/delete a function that doesn't exist ( trigger crash) in FktDlg.
* Ability to show polar and parametric graphs again

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

svn path=/trunk/kdeedu/kmplot/; revision=315952