BaseFileWizard: Initialize pages again

This was broken when getting rid of the WizardEventLoop.

Change-Id: I34488a80c01c39974380b5b9f57e028ca0d5f06c
Reviewed-by: Alessandro Portale <alessandro.portale@theqtcompany.com>
Reviewed-by: Eike Ziller <eike.ziller@theqtcompany.com>

src/plugins/coreplugin/basefilewizard.cpp

@@ -68,6 +68,7 @@ BaseFileWizard::BaseFileWizard(const BaseFileWizardFactory *factory,
 
 void BaseFileWizard::initializePage(int id)
 {
+    Wizard::initializePage(id);
     if (page(id) == m_firstExtensionPage) {
         generateFileList();