Unify wizards with TOC and cancel button.

QTBUG-28385 is biting us over and over (QWizard doesn't have close
button nor cancel button on Mac in Qt 5), and actually there's no reason
for us having a wizard without the features from Utils::Wizard.

Task-number: QTCREATORBUG-10346
Task-number: QTBUG-28385
Change-Id: I80c0d82fe6738496c2ac03c31a1c2757ade8e266
Reviewed-by: Jarek Kobus <jaroslaw.kobus@digia.com>
Reviewed-by: Daniel Teske <daniel.teske@digia.com>

src/plugins/pythoneditor/wizard/pythonclasswizarddialog.cpp

@@ -41,7 +41,6 @@ ClassWizardDialog::ClassWizardDialog(QWidget *parent)
     , m_classNamePage(new ClassNamePage(this))
 {
     setWindowTitle(tr("Python Class Wizard"));
-    Core::BaseFileWizard::setupWizard(this);
     const int classNameId = addPage(m_classNamePage.data());
     wizardProgress()->item(classNameId)->setTitle(tr("Details"));
 }

src/plugins/pythoneditor/wizard/pythonfilewizard.cpp

@@ -70,7 +70,6 @@ QWizard *FileWizard::createWizardDialog(QWidget *parent,
 {
     Utils::FileWizardDialog *pDialog = new Utils::FileWizardDialog(parent);
     pDialog->setWindowTitle(tr("New %1").arg(displayName()));
-    setupWizard(pDialog);
     pDialog->setPath(params.defaultPath());
     foreach (QWizardPage *p, params.extensionPages())
         applyExtensionPageShortTitle(pDialog, pDialog->addPage(p));