@kentico-guy that is the correct value to place in the correct field to redirect the Page tab to show the edit form instead of the standard behavior. I just placed it in a random page type on a dancing goat instance and it worked correctly. So if you don't want to show the edit form when clicking the page tab, then I would simply remove the value.
These things can be cached some times. If you recycle the app pool / restart the application via the system tab, that might "kick" the admin tool to get it to show the correct url when clicking the Page tab ui element after you change these settings.