[Glitch] Add customizable user roles

Port front-end changes from 44b2ee3485 to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/styles/forms.scss

@@ -247,6 +247,10 @@ code {
     }
   }
 
+  .input.with_block_label.user_role_permissions_as_keys ul {
+    columns: unset;
+  }
+
   .input.datetime .label_input select {
     display: inline-block;
     width: auto;