Fix #3754: Include unbans in Mod Actions.

app/models/ban.rb

@@ -1,8 +1,9 @@
 class Ban < ApplicationRecord
   after_create :create_feedback
   after_create :update_user_on_create
-  after_create :create_mod_action
+  after_create :create_ban_mod_action
   after_destroy :update_user_on_destroy
+  after_destroy :create_unban_mod_action
   belongs_to :user
   belongs_to :banner, :class_name => "User"
   validate :user_is_inferior
@@ -120,7 +121,11 @@ class Ban < ApplicationRecord
     user.feedback.create(category: "negative", body: "Banned for #{humanized_duration}: #{reason}")
   end
 
-  def create_mod_action
-    ModAction.log(%{Banned <@#{user_name}> for #{humanized_duration}: #{reason}},:user_ban)
+  def create_ban_mod_action
+    ModAction.log(%{Banned <@#{user_name}> for #{humanized_duration}: #{reason}}, :user_ban)
+  end
+
+  def create_unban_mod_action
+    ModAction.log(%{Unbanned <@#{user_name}>}, :user_unban)
   end
 end

app/models/mod_action.rb

@@ -17,6 +17,7 @@ class ModAction < ApplicationRecord
   enum category: {
     user_delete: 2,
     user_ban: 4,
+    user_unban: 5,
     user_name_change: 6,
     user_level: 7,
     user_approval_privilege: 8,