fdo#55903 - add new large zoom mode icons to galaxy and tango icon sets

Change-Id: I3a257ced17e0d494a1d1e8e8104333d8ab0fb88d
Reviewed-on: https://gerrit.libreoffice.org/11729
Reviewed-by: Samuel Mehrbrodt <s.mehrbrodt@gmail.com>
Tested-by: Samuel Mehrbrodt <s.mehrbrodt@gmail.com>