[FEATURE] Don't loose page in pager

The page is carried along while editing a record in the redirects table

Change-Id: Id3f33a70aaa1329b5186d5ca4028dd1f76fca760
Resolves: #54822
Reviewed-on: https://review.typo3.org/26685
Reviewed-by: Dmitry Dulepov
Tested-by: Dmitry Dulepov
Released version 1.12.8
[BUGFIX] No path override for mount points

When generating RealURLs for a page inside a mount point the whole
page path will never be overridden because otherwise the mount point
path will be lost.

Resolves: #57960
Change-Id: I490577fc7efbbfce0a173382c32232ecff267f54