Move Enabled to top as it's the master control of all email. Description not really needed.

config/description.exs

@@ -214,6 +214,10 @@
     type: :group,
     description: "Mailer-related settings",
     children: [
+      %{
+        key: :enabled,
+        type: :boolean,
+      },
       %{
         key: :adapter,
         type: :module,
@@ -234,11 +238,6 @@
           Swoosh.Adapters.Gmail
         ]
       },
-      %{
-        key: :enabled,
-        type: :boolean,
-        description: "Pleroma Email sending capability"
-      },
       %{
         group: {:subgroup, Swoosh.Adapters.SMTP},
         key: :relay,