Trigger scan for wizards in delayedInitialize since we need to
create commands for the wizards. Also make sure wizards are
scanned for when opening the options page, so that the keyboard
shortcut page can be fully populated.

Change-Id: Iefe28dbcb17f43a7ed114f056012fe8f6e4ae352
Reviewed-by: Eike Ziller <eike.ziller@theqtcompany.com>