fix #15876: if a file name contains a newline, the newline was displayed in the status bar, which m

with this patch all newlines are replaced with a space in the status bar info, so
this doesn't happen anymore. Maybe it could also be replaced by "
" or "\n" or ...

Maybe this could even be moved to KStringHandler cPixelSqueeze ?
Does this still exist in KDE4 or has it been replaced by some Qt function ?