Update PNG icons with broken profiles

http://www.playonlinux.com/en/topic-10442-New_Warning_Message_on_startup.html

Original resources/images/toolbar/48/stop.png looked wrong (blue down
arrow, out of style with other icons and 32x32 pixels version), replaced
with upscaled version of 32x32 pixels for now, I don't remember the
original source.
Merge branch 'master' of github.com:PlayOnLinux/POL-POM-4