[TASK] Show info in empty list module

If the selected page doesn't contain any records to edit, the module
is completly empty. This looks like an error ("white page").

Show a flash message instead.

Resolves: #58743
Releases: master
Change-Id: I4b3fa45d36e42a06ba9855d9d72f0995eac3b0dd
Reviewed-on: http://review.typo3.org/35505
Reviewed-by: Alexander Opitz <opitz.alexander@googlemail.com>
Tested-by: Alexander Opitz <opitz.alexander@googlemail.com>
Reviewed-by: Mathias Brodala <mbrodala@pagemachine.de>
Reviewed-by: Frank Nägler <typo3@naegler.net>
Tested-by: Frank Nägler <typo3@naegler.net>