Missing "Read only" option for persistence in new Greeter
_Originally created by @intrigeri on [#12093 (Redmine)](https://public-redmine-archive.tails.boum.org/code/issues/12093)_
As the attached video shows, the new Greeter doesn’t seem to allow
unlocking a persistent volume in read-only mode. Is that by design and
on purpose?
### Attachments
* [02_25_52_Booting_Tails_from_a_USB_drive_with_an_enabled_persistent_partition_and_reconfiguring_it.mkv](https://redmine.tails.boum.org/code/attachments/download/1515/02_25_52_Booting_Tails_from_a_USB_drive_with_an_enabled_persistent_partition_and_reconfiguring_it.mkv)
Parent Task: tails/tails#8230
### Related issues
- **Related to** tails/tails#12055
- **Related to** tails/tails#12361
issue