Start migrating away from Qt3Support classes.

Port from Q3ButtonGroup to QButtonGroup.
Port from KProgressDialog to QProgressDialog.
Move phrasebookui.rc to top level and install from main CMakeLists.txt
Port from K3Wizard to QWizard.
Changed QWidgets to QWizardPage and made CreationSourceWidget control
  which page to go to next based on what is selected.