Load multilang support globally

While loading the multilang support only on the respective pages sounds like a good idea, it complicates matters with the Turbo migration (since we would need to opt-out of some cases). Also, the exercise description is used in too many places, whereas the snippet is rather short and the performance impact to load it globally is rather minimal.

Amends 7d4dd2c

Author: MrSerth

app/views/exercises/_form.html.slim

@@ -1,5 +1,4 @@
 - content_for :head do
-  - append_stylesheet_pack_tag("multilang_#{I18n.locale}")
   - append_javascript_pack_tag('sortable')
   - append_javascript_pack_tag('toast-ui')
   - append_stylesheet_pack_tag('toast-ui')

app/views/exercises/_tips_content.html.slim

@@ -1,7 +1,6 @@
 - content_for :head do
   - append_javascript_pack_tag('highlight')
   - append_stylesheet_pack_tag('highlight')
-  - append_stylesheet_pack_tag("multilang_#{I18n.locale}")
 
 #tips.card.d-block.overflow-scroll role='tab'
   .card-header.py-2

app/views/exercises/implement.html.slim

@@ -1,6 +1,3 @@
-- content_for :head do
-  - append_stylesheet_pack_tag("multilang_#{I18n.locale}")
-
 #editor-column
   - unless @embed_options[:hide_exercise_description]
     .exercise.clearfix

app/views/layouts/application.html.slim

@@ -12,7 +12,7 @@ html lang=I18n.locale data-default-locale=I18n.default_locale
     = favicon_link_tag('/icon.png', rel: 'apple-touch-icon', type: 'image/png')
     = tag.link rel: 'manifest', href: pwa_manifest_path
     = action_cable_meta_tag
-    = stylesheet_pack_tag('application', 'stylesheets', media: 'all', 'data-turbo-track': 'reload', integrity: true, crossorigin: 'anonymous')
+    = stylesheet_pack_tag('application', 'stylesheets', "multilang_#{I18n.locale}", media: 'all', 'data-turbo-track': 'reload', integrity: true, crossorigin: 'anonymous')
     = stylesheet_link_tag('application', media: 'all', 'data-turbo-track': 'reload', integrity: true, crossorigin: 'anonymous')
     // Since d3-tip is loaded via a separate pack and requires the application pack to be loaded first, we cannot use `defer` here.
     = javascript_pack_tag('application', 'data-turbo-track': 'reload', defer: false, integrity: true, crossorigin: 'anonymous')

app/views/tips/_form.html.slim

@@ -1,5 +1,4 @@
 - content_for :head do
-  - append_stylesheet_pack_tag("multilang_#{I18n.locale}")
   - append_javascript_pack_tag('toast-ui')
   - append_stylesheet_pack_tag('toast-ui')
 

app/views/tips/show.html.slim

@@ -1,7 +1,6 @@
 - content_for :head do
   - append_javascript_pack_tag('highlight')
   - append_stylesheet_pack_tag('highlight')
-  - append_stylesheet_pack_tag("multilang_#{I18n.locale}")
 
 h1
   = @tip.to_s