Incorrect default value in link creation dialog leads to invalid page links in terminal pages

Steps to reproduce:

1. Enable Advanced User mode.
2. Create a new terminal page
3. Select a word or phrase that is not already a link.
4. Use the shortcut CTRL + K to trigger the link creation dialog (or use the editor toolbar)
5. Proceed to create the link without editing the default suggestion.

Actual result

User creates invalid link

xwiki:Main.{selectedWord}

and unintentionally may create a non-existent page under the Main space.

Expected result

Before the regression the dialog uses to only fill the field with the selected word: in such case the creation link was using [lastSpace of current reference].[selectedWord].WebHome for creating the page.

Note

This issue does not occur in versions before XWiki 16.8.0. It has been observed starting from XWiki 16.8.0-RC1 with this change