You shouldn't have to force the page lock for page without locale to enter a realtime editing session

This is rare, as you will usually not get pages without locale unless you had them before in old XWiki versions or you made some bad changes via XWiki UI operations or scripts.

Prerequisites:

• Multilanguage
• More than user in XWiki
• User's type advanced and editor's preferences WYSIWYG

Steps to reproduce:

1. Go to any Sandbox page
2. Change default English locale to None
3. Start editing that page in realtime session
4. Try to join realtime session by another user in another web-browser

Actual result

The user trying to join an open realtime session will first see a warning window, after force editing that user will connect to realtime session warning message for second user.png

Expected result

The user doesn't receive any warnings when attempting to join a realtime editing session.