In file page-content.php at line 163. There is a setting called "page_featured_sidable". I tried to find a reference to this to make sure the misspelling wasnt on purpose. When I did a search for that setting I could find one, but I did find a setting called "page_featured_disable" in file it-options.php on line 1319. I hope this info is useful to you.
Yes that is very useful, thanks for pointing that out! I'll fix it in the next theme update.