Core: Replace an in-Core connection by a direct call

Change-Id: Ic219a992658e080467a18d38121a41990cc377ce
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/coreplugin/icore.cpp

@@ -358,6 +358,8 @@ void ICore::showNewItemDialog(const QString &title,
 bool ICore::showOptionsDialog(const Id page, QWidget *parent)
 {
     // Make sure all wizards are there when the user might access the keyboard shortcuts:
+    (void) IWizardFactory::allWizardFactories();
+
     emit m_instance->optionsDialogRequested();
 
     if (!parent)