linuxmint/nemo — pull request #162 by mtwebster (2012-12-20 23:34:16+00:00)
Title: Share show-hidden preference with GTK Filechooser

Note in ubuntu this has appears to have limited effect (for now)
since many apps still use the gtk-2.0 folder location for gtk settings

from:
https://bugzilla.gnome.org/show_bug.cgi?id=143599