TYPO3 Core

I needed to change the mount point location and re selected a new page. When I saved I got the yellow exclamation mark complaining.

It was not obvious that the problem was the fact that more than one item was now selected. Of course only one item could be shown as the box size is limited to one height.

I am not sure how best to fix this easily. I think making the select box display more items will make it obvious that there are two items in the list rather than just one.

(issue imported from #M4148)