Provide a way to make a sticky notice (block using CSS fixed property to stay in place)

After searching for things like "drupal fixed sticky notice" realized the way most people would think of this is "drupal sitewide notice" and found:

https://www.drupal.org/project/site_alert →

and

https://www.drupal.org/project/sitewide_alert →

Both seem far more dependent on JavaScript than i like for the simpler use cases, but the latter at least might be moving in a direction that could make that optional: https://www.drupal.org/project/sitewide_alert/issues/3291075#comment-153... ✨ Render site alerts as part of the page content Needs review

Actually this looks like the best fit for Drutopia at the moment:

https://www.drupal.org/project/dismissible_message_bar →

I ended up creating the module [Dismissable blocks]( https://www.drupal.org/project/dismissableblocks → ) for this purpose.