Update Active Admin v4.0.0.beta19 ruby gem (#921)

The previous commit only updated the UI

Author: tagliala

Gemfile

@@ -12,7 +12,7 @@ gem "sprockets-rails"
 gem "cssbundling-rails", "1.4.2" # TODO: relax this dependency when rails/cssbundling-rails#169 will be fixed
 gem "importmap-rails"
 
-gem "activeadmin", "4.0.0.beta18" # github: "activeadmin/activeadmin", branch: "master"
+gem "activeadmin", "4.0.0.beta19" # github: "activeadmin/activeadmin", branch: "master"
 gem "devise"
 
 # Windows does not include zoneinfo files, so bundle the tzinfo-data gem

Gemfile.lock

@@ -47,7 +47,7 @@ GEM
       erubi (~> 1.11)
       rails-dom-testing (~> 2.2)
       rails-html-sanitizer (~> 1.6)
-    activeadmin (4.0.0.beta18)
+    activeadmin (4.0.0.beta19)
       arbre (~> 2.0)
       csv
       formtastic (>= 5.0)
@@ -310,7 +310,7 @@ PLATFORMS
   x86_64-linux
 
 DEPENDENCIES
-  activeadmin (= 4.0.0.beta18)
+  activeadmin (= 4.0.0.beta19)
   capybara
   cssbundling-rails (= 1.4.2)
   debug