The icons were in the wrong direction (the arrow pointing to the
opposite side)  so I flipped them horizontally (and changed colors
when necessary).

Note: icon-themes is based on languages rather than interface direction
so there might be other languages I'm unaware of.

Change-Id: If44bed902d763ebbc41ca422399bfd48cc390f93
Reviewed-on: https://gerrit.libreoffice.org/1712Reviewed-by: Michael Meeks <michael.meeks@suse.com>
Tested-by: Michael Meeks <michael.meeks@suse.com>