Turn off automatic redirect on page rename by default

This is related to XWIKI-13384 but is about choosing the default value.

Rationale for turning it off by default:

• Several users have reported a usability issue about automatic redirects. The way they express it is the following: "I have duplicates pages in my wiki. I don't understand why this is happening. I'm choosing to rename pages and not to copy them but I still get duplicates in the Navigation panel".
• Automatic redirects are especially useful for public wikis where users can have bookmark on pages and you don't want to break them. It can also be useful for internal wikis but it's less an issue.
• Even for public wikis not all pages need automatic redirects. Technical pages don't need them for example.

Taken all input into account, I believe that we should have the redirect checkbox turned off by default in the Move/Rename UI.