* ios: digital password (instead of device auth)
* set, ask, change password
* kind of working, sometimes
* ZSTack
* fix cancel
* update title
* fix password showing after settings dismissed
* disable button when 16 digits entered
* fixes
* layout on larger screens
* do not disable auth when switching to system if system auth failed, refactor
* fix enabling auth via the initial alert
* support landscape orientation
Avently