The text on the save buttons in the ACL changes series modal is unclear to me.

After looking at #1278, which introduced the second button, I realized that one of the two buttons will override the ACL of all events in that series. The other button will only modify the series ACL.

The end user won't know the difference between the two buttons, they need a better explanation. e.g. "Save series permission" and "Save series and override Event permissions".

The second problem is that the behavior is not as described in the documentation (https://docs.opencast.org/r/17.x/admin/#configuration/acl/#updating-series-permissions) and is different from the old admin UI.
Depending on the configured merge mode, overriding the event ACL may not make sense (e.g., with the "actions" merge mode). At our institution we have such a setting and would expect to still be able to use the parameter prop.admin.series.acl.event.update.mode=never, as described in the documentation, to deactivate the button that overrides all event ACLs.