Lossless optimisation of png files in Breeze icon theme, using ImageOptim. Second round.
Saved ~130KB out of 580KB. ~20% overall (up to 78% per file).

Change-Id: Ie83f57790daff82b251bd8d6607d9e33ae10b563
Signed-off-by: Andrew <dent.ace@gmail.com>
Reviewed-on: https://gerrit.libreoffice.org/15166Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Adolfo Jayme Barrientos <fitojb@ubuntu.com>
Tested-by: Adolfo Jayme Barrientos <fitojb@ubuntu.com>