Add option to disable blurhash previews (#11188)

* Add option to disable blurhash previews

* Update option text

* Change options order

config/locales/simple_form.en.yml

@@ -34,6 +34,7 @@ en:
         setting_hide_network: Who you follow and who follows you will not be shown on your profile
         setting_noindex: Affects your public profile and status pages
         setting_show_application: The application you use to toot will be displayed in the detailed view of your toots
+        setting_use_blurhash: Gradients are based on the colors of the hidden visuals but obfuscate any details
         username: Your username will be unique on %{domain}
         whole_word: When the keyword or phrase is alphanumeric only, it will only be applied if it matches the whole word
       featured_tag:
@@ -109,6 +110,7 @@ en:
         setting_system_font_ui: Use system's default font
         setting_theme: Site theme
         setting_unfollow_modal: Show confirmation dialog before unfollowing someone
+        setting_use_blurhash: Show colorful gradients for hidden media
         severity: Severity
         type: Import type
         username: Username

config/settings.yml

@@ -32,6 +32,7 @@ defaults: &defaults
   theme: 'default'
   aggregate_reblogs: true
   advanced_layout: false
+  use_blurhash: true
   notification_emails:
     follow: false
     reblog: false