Merge branch 'upgrade-font-awesome' into 'master'

Upgrade font-awesome-rails to 4.5.0.1

Includes Rails 5 support.

[See Changelog for details](https://github.com/bokmann/font-awesome-rails/releases/tag/v4.5.0.1).

Working towards #14286.

See merge request !3399

Gemfile.lock

@@ -325,8 +325,8 @@ GEM
     fog-xml (0.1.2)
       fog-core
       nokogiri (~> 1.5, >= 1.5.11)
-    font-awesome-rails (4.5.0.0)
-      railties (>= 3.2, < 5.0)
+    font-awesome-rails (4.5.0.1)
+      railties (>= 3.2, < 5.1)
     foreman (0.78.0)
       thor (~> 0.19.1)
     formatador (0.2.5)