Thanks for the feedback. You're right, when reloading the page, it currently does not remember the previous state so you would have to click on the individual widgets to expand them again.
Linked items can lead to other pages, you just need to click the link item and enter a page name or url in the link input. I probably need to make this more obvious somehow.
As for the addition of items on enter, it just seems to have been missed somehow, it really should be available from a usability point of view.
Thanks again for your feedback