When renaming a page provide a search result about the page to help the user judge the consequences

Right now when we rename a page there are plenty of cases we don't take into account:

• Renaming references in xobjects: XWIKI-981
• Renaming xobjects if the page contains an xclass definition: XWIKI-1660
• Renaming references in JS/CSS

In addition there might simple text, comments, etc about the page being renamed.

Thus it would be nice to list the result of a SOLR search on the page name/reference so that the user could see the pages referencing the page to be renamed, and decide the breadth of changes he'll need to do.