Ensure the icon font is loaded only once globally

If we do not ensure this, components will double load the font,
resulting in 404 font requests and breaking travis

Gemfile

@@ -98,9 +98,6 @@ gem 'svg-graph', '~> 2.1.0'
 gem 'date_validator', '~> 0.9.0'
 gem 'ruby-duration', '~> 3.2.0'
 
-gem 'sassc-rails'
-gem 'livingstyleguide', '~> 2.1.0'
-
 # provide compatible filesystem information for available storage
 gem 'sys-filesystem', '~> 1.3.3', require: false
 
@@ -250,6 +247,10 @@ group :development do
   gem 'spring-commands-rspec'
 
   gem 'rubocop'
+
+  # Gems for living styleguide
+  gem 'sassc-rails'
+  gem 'livingstyleguide', '~> 2.1.0'
 end
 
 group :development, :test do

config/initializers/assets.rb

@@ -3,8 +3,6 @@ OpenProject::Application.configure do
   # application.js, application.css, and all non-JS/CSS in app/assets folder are already added.
   config.assets.precompile += %w(
     favicon.ico
-    openproject.css
-    accessibility.css
     admin_users.js
     autocompleter.js
     copy_issue_actions.js

frontend/src/global_styles/fonts/_index.sass

@@ -1,2 +1,3 @@
 @import lato
 @import openproject_icon_font
+@import openproject_icon_font_face

frontend/src/global_styles/fonts/_openproject_icon_definitions.scss

@@ -1,9 +1,3 @@
-@font-face {
-	font-family: "openproject-icon-font";
-	src: url("~assets/fonts/openproject_icon/openproject-icon-font.woff2") format("woff2"),
-       url("~assets/fonts/openproject_icon/openproject-icon-font.woff") format("woff");
-}
-
 @mixin icon-mixin-accessibility {
     content: "\f101";
 }

frontend/src/global_styles/fonts/_openproject_icon_font_face.scss

@@ -0,0 +1,34 @@
+//-- copyright
+// OpenProject is an open source project management software.
+// Copyright (C) 2012-2020 the OpenProject GmbH
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License version 3.
+//
+// OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
+// Copyright (C) 2006-2017 Jean-Philippe Lang
+// Copyright (C) 2010-2013 the ChiliProject Team
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License
+// as published by the Free Software Foundation; either version 2
+// of the License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+// See docs/COPYRIGHT.rdoc for more details.
+//++
+
+@font-face {
+  font-family: "openproject-icon-font";
+  src: url("~assets/fonts/openproject_icon/openproject-icon-font.woff2") format("woff2"),
+  url("~assets/fonts/openproject_icon/openproject-icon-font.woff") format("woff");
+}
+

vendor/openproject-icon-font/openproject-icon-font.template.scss

@@ -1,9 +1,3 @@
-@font-face {
-	font-family: "openproject-icon-font";
-	src: url(font-path("openproject_icon/openproject-icon-font.woff2")) format("woff2"),
-       url(font-path("openproject_icon/openproject-icon-font.woff")) format("woff");
-}
-
 {{#each codepoints}}
 @mixin icon-mixin-{{@key}} {
     content: "\\{{this}}";