adds 'show icons: on' to cabbiev2.cfg file.
when you switch theme away from cabbiev2 to a theme
with 'show icons: off' then switch back to cabbiev2
the icons are still off which doesnt mimic the default
settings presented by rockbox.
Change-Id: Iee051c687a9a6843fece96a2a16280916b1d2599
Reviewed-on: http://gerrit.rockbox.org/325
Reviewed-by: Dominik Riebeling <Dominik.Riebeling@gmail.com>
Reviewed-by: Thomas Martitz <kugel@rockbox.org>
