Update from transifex
A few content fixes from translating

While translating we caught a couple of places where the english text
needed updating. Adding those strings as requested by Nuritzi and
Cassandra
Update pot file
Darken the gnome icon colors to better fit our theme

Just did a find and replace on #bababa (the gnome icon color) to #2a2a2a
(a common dark color in our theme)

Also increased the opacity of some of the transparent icons somewhat
[endlessm/eos-shell#4324]
Merge pull request #13 from endlessm/shell/4324

Darken the gnome icon colors to better fit our theme
Update from transifex
Update pot file

With the new darker gnome svg assets, so image hashes got changed
Update from transifex
Update from transifex

Fixes a broken link in the spanish version of the help center