Re: #1698 icon field update and rename

Gemfile

@@ -11,10 +11,10 @@ gem 'country_select'
 gem 'delayed_job_active_record'
 gem 'dragonfly-s3_data_store'
 gem 'dragonfly-swift_data_store', github: 'europeana/dragonfly-swift-data-store', tag: 'v0.1.0'
-gem 'europeana-styleguide', github: 'europeana/europeana-styleguide-ruby', ref: 'e74cf01'
+gem 'europeana-styleguide', github: 'europeana/europeana-styleguide-ruby', ref: '5e6e367'
 gem 'jbuilder', '~> 2.0'
 gem 'jquery-rails'
-gem 'nokogiri', '>= 1.7.1' # Forced update for security issues
+gem 'nokogiri', '>= 1.6.8' # Forced update for security issues
 gem 'pg', '~> 0.15'
 gem 'puma', '~> 2.13'
 gem 'rack-plastic'

Gemfile.lock

@@ -9,8 +9,8 @@ GIT
 
 GIT
   remote: git://github.com/europeana/europeana-styleguide-ruby.git
-  revision: e74cf01139ed3230c8c14bd6f0fa63d264ca7da5
-  ref: e74cf01
+  revision: 5e6e367d6f10a33efae8a037a60d0a2585cfba44
+  ref: 5e6e367
   specs:
     europeana-styleguide (0.2.0)
       activesupport (~> 4.0)
@@ -262,7 +262,7 @@ GEM
     mini_portile2 (2.1.0)
     minitest (5.10.1)
     multi_json (1.12.1)
-    mustache (1.0.3)
+    mustache (1.0.5)
     netrc (0.11.0)
     newrelic_rpm (3.15.1.316)
     nokogiri (1.7.1)
@@ -483,7 +483,7 @@ DEPENDENCIES
   jquery-rails
   localeapp (~> 1.0)
   newrelic_rpm
-  nokogiri (>= 1.7.1)
+  nokogiri (>= 1.6.8)
   pg (~> 0.15)
   phantomjs
   poltergeist
@@ -508,6 +508,3 @@ DEPENDENCIES
   turbolinks
   uglifier (>= 1.3.0)
   web-console (~> 2.0)
-
-BUNDLED WITH
-   1.14.6

app/helpers/mustache_helper.rb

@@ -66,7 +66,7 @@ def utility_nav
         {
           url: '#',
           text: t('site.settings.language.label'),
-          icon: 'language',
+          icon_class: 'svg-icon-language',
           submenu: {
             items: page_object.alternatives.map do |alt|
               {