Add customizable user roles (#18641)

* Add customizable user roles

* Various fixes and improvements

* Add migration for old settings and fix tootctl role management

app/javascript/styles/mastodon/forms.scss

@@ -256,6 +256,10 @@ code {
     }
   }
 
+  .input.with_block_label.user_role_permissions_as_keys ul {
+    columns: unset;
+  }
+
   .input.datetime .label_input select {
     display: inline-block;
     width: auto;