Revert "tdf#103677 Icons Change"

This reverts commit 1cb1cc30.

Setup.ico contains of three different image sizes. Furthermore, the design is not applied to the other setup icons (partial, complete). And please discuss proposal first.

Change-Id: I3cc9ad3424f85c812ae89939cabaddf38e3c41b3
Reviewed-on: https://gerrit.libreoffice.org/32751Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Heiko Tietze <tietze.heiko@googlemail.com>