fix: SuperAdmin Improvements (#3733)

- Fix broken access tokens pages
- Fix broken avatar images in the super admin users tab
- Fix broken pagination links in super admin
- Add agent bot tabs

Fixes: #2021

db/migrate/20220111223630_remove_platform_app_permissible_access_tokens.rb

@@ -0,0 +1,5 @@
+class RemovePlatformAppPermissibleAccessTokens < ActiveRecord::Migration[6.1]
+  def change
+    AccessToken.where(owner_type: 'PlatformAppPermissible').destroy_all
+  end
+end