Revert Ember 2.10+ for a short while

config/application.rb

@@ -142,7 +142,7 @@ module Discourse
 
     # Our templates shouldn't start with 'discourse/templates'
     config.handlebars.templates_root = 'discourse/templates'
-    config.handlebars.raw_template_namespace = "Discourse.RAW_TEMPLATES"
+    config.handlebars.raw_template_namespace = "Ember.TEMPLATES"
 
     require 'discourse_redis'
     require 'logster/redis_store'

config/locales/server.en.yml

@@ -1306,9 +1306,6 @@ en:
     delete_digest_email_after_days: "Suppress summary emails for users not seen on the site for more than (n) days."
     digest_suppress_categories: "Suppress these categories from summary emails."
     disable_digest_emails: "Disable summary emails for all users."
-    email_accent_bg_color: "The accent color to be used as the background of some elements in HTML emails. Enter a color name ('red') or hex value ('#FF000')."
-    email_accent_fg_color: "The color of text rendered on the email bg color in HTML emails. Enter a color name ('white') or hex value ('#FFFFFF')."
-    email_link_color: "The color of links in HTML emails. Enter a color name ('blue') or hex value ('#0000FF')."
 
     detect_custom_avatars: "Whether or not to check that users have uploaded custom profile pictures."
     max_daily_gravatar_crawls: "Maximum number of times Discourse will check Gravatar for custom avatars in a day"

config/site_settings.yml

@@ -599,9 +599,6 @@ email:
   disable_digest_emails:
     default: false
     client: true
-  email_accent_bg_color: "#2F70AC"
-  email_accent_fg_color: "#FFFFFF"
-  email_link_color: "#006699"
   show_topic_featured_link_in_digest: false
   email_custom_headers: 'Auto-Submitted: auto-generated'
   email_subject: '[%{site_name}] %{optional_pm}%{optional_cat}%{topic_title}'