FEATURE: allow disabling theme components (#7812)

This allows you to temporarily disable components without having to remove them from a theme. 

This feature is very handy when doing quick fix engineering.

app/models/user_history.rb

@@ -95,7 +95,9 @@ class UserHistory < ActiveRecord::Base
       embeddable_host_update: 74,
       embeddable_host_destroy: 75,
       web_hook_deactivate: 76,
-      change_theme_setting: 77
+      change_theme_setting: 77,
+      disable_theme_component: 78,
+      enable_theme_component: 79
     )
   end