fdo#84405 TRACK CHANGES: New icons for the changes toolbar (small)

Change-Id: I62a942dc525eea17115959533f0c9b06b85722c6
Reviewed-on: https://gerrit.libreoffice.org/12033
Reviewed-by: Adolfo Jayme Barrientos <fitojb@ubuntu.com>
Reviewed-by: Samuel Mehrbrodt <s.mehrbrodt@gmail.com>
Tested-by: Samuel Mehrbrodt <s.mehrbrodt@gmail.com>