tdf#75256 sifr icons for the startcenter part 2

Adding recent-documents.png

Change-Id: I4336ea8c9493bcc2ce713d9f04c100e02961850f
Reviewed-on: https://gerrit.libreoffice.org/19165Reviewed-by: Adolfo Jayme Barrientos <fitojb@ubuntu.com>
Tested-by: Adolfo Jayme Barrientos <fitojb@ubuntu.com>
(cherry picked from commit 9d691364)
Reviewed-on: https://gerrit.libreoffice.org/19169