TYPO3 Core

If you want to change a select-field in TCEforms with only one item (like the Storage Folder) where there is only one item allowed.

Steps to reproduce:

• Edit the page properties
• Select a page for a "storage folder" from the element browser
• Select another item from the element browser, you'll get an error because there are no two items in the list (although you only see one).
• Once you want to remove the first element, both are gone and you have to open up the element browser again

With this patch the second value replaces the first one when only one is allowed (maxItems).

(issue imported from #M11087)