diff --git a/core/modules/system/config/schema/system.schema.yml b/core/modules/system/config/schema/system.schema.yml
index 5f9abd9..8503757 100644
--- a/core/modules/system/config/schema/system.schema.yml
+++ b/core/modules/system/config/schema/system.schema.yml
@@ -3,28 +3,28 @@ system.site:
   type: mapping
   label: 'Site information'
   mapping:
-    "name":
-      label: "Site name"
+    name:
+      label: 'Site name'
       type: label
-    "mail":
-      label: "Site mail"
+    mail:
+      label: 'Site mail'
       type: email
-    "slogan":
-      label: "Site slogan"
+    slogan:
+      label: 'Site slogan'
       type: text
-    "page":
+    page:
       type: mapping
       mapping:
-        "403":
+        403:
           type: path
-        "404":
+        404:
           type: path
-        "front":
+        front:
           type: path
-          label: "Front page path"
-    "admin_compact_mode":
+          label: 'Front page path'
+    admin_compact_mode:
       type: boolean
-    "weight_select_max":
+    weight_select_max:
       type: integer
 
 # System maintenance settings
@@ -32,245 +32,245 @@ system.maintenance:
   type: mapping
   label: 'Maintenance mode'
   mapping:
-    "enabled":
+    enabled:
       type: boolean
-      label: "Put site into maintenance mode"
-    "message":
+      label: 'Put site into maintenance mode'
+    message:
       type: text
-      label: "Message to display when in maintenance mode"
+      label: 'Message to display when in maintenance mode'
 
 # System Authorize
 system.authorize:
   type: mapping
-  label: 'Authorize Settings'
+  label: 'Authorize settings'
   mapping:
-    "allow_authorize_operations":
+    allow_authorize_operations:
       type: boolean
-      label: "Allow Authorize Operations"
-    "filetransfer_default":
+      label: 'Allow authorize operations'
+    filetransfer_default:
       type: string
-      label: "Default file transfer protocol"
+      label: 'Default file transfer protocol'
 
 # System Cron
 system.cron:
   type: mapping
-  label: 'Cron Settings'
+  label: 'Cron settings'
   mapping:
-    "threshold":
+    threshold:
       type: mapping
-      label: "Cron threshold settings"
+      label: 'Cron threshold settings'
       mapping:
-        "autorun":
+        autorun:
           type: integer
-          label: "Autorun period"
-        "requirements_warning":
+          label: 'Autorun period'
+        requirements_warning:
           type: integer
-          label: "Requirements warning period"
-        "requirements_error":
+          label: 'Requirements warning period'
+        requirements_error:
           type: integer
-          label: "Requirements error period"
+          label: 'Requirements error period'
 
 # System Date
 system.date:
   type: mapping
-  label: 'Date Settings'
+  label: 'Date settings'
   mapping:
-    "first_day":
+    first_day:
       type: integer
-      label: "First day"
-    "country":
+      label: 'First day'
+    country:
       type: mapping
-      label: "Country"
+      label: Country
       mapping:
-        "default":
-          type: "string"
-          label: "Default Country"
-    "formats":
+        default:
+          type: string
+          label: 'Default Country'
+    formats:
       type: mapping
-      label: "Date formats"
+      label: 'Date formats'
       mapping:
-        "long":
+        long:
           type: date_format
-          label: "Long format"
-        "medium":
+          label: 'Long format'
+        medium:
           type: date_format
-          label: "Medium format"
-        "short":
+          label: 'Medium format'
+        short:
           type: date_format
-          label: "Short format"
-        "html_datetime":
+          label: 'Short format'
+        html_datetime:
           type: date_format
-          label: "HTML datetime"
-        "html_date":
+          label: 'HTML datetime'
+        html_date:
           type: date_format
-          label: "HTML date"
-        "html_time":
+          label: 'HTML date'
+        html_time:
           type: date_format
-          label: "HTML time"
-        "html_yearless_date":
+          label: 'HTML time'
+        html_yearless_date:
           type: date_format
-          label: "HTML yearless date"
-        "html_week":
+          label: 'HTML yearless date'
+        html_week:
           type: date_format
-          label: "HTML week"
-        "html_month":
+          label: 'HTML week'
+        html_month:
           type: date_format
-          label: "HTML month"
-        "html_year":
+          label: 'HTML month'
+        html_year:
           type: date_format
-          label: "HTML year"
+          label: 'HTML year'
 
 # System fast 404
 system.fast_404:
   type: mapping
-  label: 'Fast 404 Settings'
+  label: 'Fast 404 settings'
   mapping:
-    "enabled":
+    enabled:
       type: boolean
-      label: "fast 404 enabled"
-    "paths":
+      label: 'Fast 404 enabled'
+    paths:
       type: string
-      label: "fast 404 paths"
-    "exclude_paths":
+      label: 'Fast 404 paths'
+    exclude_paths:
       type: string
-      label: "fast 404 exclude paths"
-    "html":
+      label: 'Fast 404 exclude paths'
+    html:
       type: string
-      label: "fast 404 html"
+      label: 'Fast 404 html'
 
 # System Filter
 system.filter:
   type: mapping
   label: 'Filter settings'
   mapping:
-    "protocols":
+    protocols:
       type: sequence
-      label: "Protocols"
+      label: Protocols
 
 # System Logging
 system.logging:
   type: mapping
-  label: 'Logging Settings'
+  label: 'Logging settings'
   mapping:
-    "error_level":
+    error_level:
       type: string
-      label: "Error Level"
+      label: 'Error level'
 
 # System Menu
 system.menu:
   type: mapping
-  label: 'Menu Settings'
+  label: 'Menu settings'
   mapping:
-    "active_menus_default":
+    active_menus_default:
       type: string
-      label: "Active menus"
+      label: 'Active menus'
 
 # System Performance
 system.performance:
   type: mapping
-  label: 'Performance Settings'
+  label: 'Performance settings'
   mapping:
-    "cache":
+    cache:
       type: mapping
-      label: "Cache"
+      label: Cache
       mapping:
-        "page":
+        page:
           type: mapping
-          label: "Page cache"
+          label: 'Page cache'
           mapping:
-            "enabled":
+            enabled:
               type: boolean
-              label: "Page cache enabled"
-            "max_age":
+              label: 'Page cache enabled'
+            max_age:
               type: integer
-              label: "Max age of page cache"
-    "css":
+              label: 'Max age of page cache'
+    css:
       type: mapping
-      label: "CSS performance settings"
+      label: 'CSS performance settings'
       mapping:
-        "preprocess":
+        preprocess:
           type: boolean
-          label: "CSS preprocess"
-        "gzip":
+          label: 'CSS preprocess'
+        gzip:
           type: boolean
-          label: "CSS gzip"
-    "js":
+          label: 'CSS gzip'
+    js:
       type: mapping
-      label: "JS performance settings"
+      label: 'JS performance settings'
       mapping:
-        "preprocess":
+        preprocess:
           type: boolean
-          label: "JS preprocess"
-        "gzip":
+          label: 'JS preprocess'
+        gzip:
           type: boolean
-          label: "JS gzip"
-    "response":
+          label: 'JS gzip'
+    response:
       type: mapping
-      label: "Cached page compression"
+      label: 'Cached page compression'
       mapping:
-        "gzip":
+        gzip:
           type: boolean
-          label: "Cached page gzip"
-    "stale_file_threshold":
+          label: 'Cached page gzip'
+    stale_file_threshold:
       type: integer
-      label: "Stale file threshold"
-    "theme_link":
+      label: 'Stale file threshold'
+    theme_link:
       type: boolean
-      label: "Theme link"
+      label: 'Theme link'
 
 # System RSS
 system.rss:
   type: mapping
-  label: 'RSS Settings'
+  label: 'RSS settings'
   mapping:
-    "channel":
+    channel:
       type: mapping
-      label: "RSS channel"
+      label: 'RSS channel'
       mapping:
-        "description":
+        description:
           type: string
-          label: "RSS description"
-    "items":
+          label: 'RSS description'
+    items:
       type: mapping
-      label: "RSS items"
+      label: 'RSS items'
       mapping:
-        "limit":
+        limit:
           type: integer
-          description: "RSS item limit"
-        "view_mode":
+          label: 'RSS item limit'
+        view_mode:
           type: string
-          description: "RSS view mode"
+          label: 'RSS view mode'
 
 # System Theme
 system.theme:
   type: mapping
-  label: 'Theme Settings'
+  label: 'Theme settings'
   mapping:
-    "admin":
+    admin:
       type: string
-      label: "Admin theme"
-    "enabled":
+      label: 'Admin theme'
+    enabled:
       type: string
-      label: "Enabled themes"
+      label: 'Enabled themes'
 
 # System Timezone
 system.timezone:
   type: mapping
-  label: 'Timezone Settings'
+  label: 'Timezone settings'
   mapping:
-    "default":
+    default:
       type: string
-      label: "Default timezone settings"
-    "user":
+      label: 'Default timezone settings'
+    user:
       type: mapping
       mapping:
-        "configurable":
+        configurable:
           type: boolean
-          label: "User configurable timezones"
-        "default":
+          label: 'User configurable timezones'
+        default:
           type: integer
-          label: "Default timezone setting at registration"
-        "warn":
+          label: 'Default timezone setting at registration'
+        warn:
           type: boolean
-          label: "Warn user of NULL timezone"
+          label: 'Warn user of no timezone'