symbolic: rename bookmark-add to bookmark-new

https://bugzilla.gnome.org/show_bug.cgi?id=732219
fullcolor: sync edit-clear* metaphors

https://bugzilla.gnome.org/show_bug.cgi?id=732219
symbolic: remove non-standard 'headphones'

- there's audio-headphones according to the name spec

https://bugzilla.gnome.org/show_bug.cgi?id=732219
symbolic: typo at face-surprise

https://bugzilla.gnome.org/show_bug.cgi?id=732219