Redmine

When adding members, group users, or watchers, checkbox selections are lost when the search query changes.
This makes it difficult to select multiple users while searching.

Save and restore checkbox states across AJAX requests in observeSearchfield.
With this patch, only users currently visible in the search results will be submitted. Users who were checked but are hidden by the current search query will not be included.

I would appreciate feedback on whether this behavior is acceptable or if hidden selections should also be submitted.