This feature works for MacOs only, for now.
On login, whether new or already created user may select between options:
"Store" - store password to the Keychain
"Not now" - don't store it now, but ask next time again
"Never" - don't store them ever and don't ask again
Selected preference may be changed later in:
`ProfileSettings > Privacy and security > Store pass to Keychain`
On the next app run, if `Store` was selected, a user will be asked to confirm
his identity using Touch Id in order to log in the app. If any error happens
he will be able to login using password.
Fixes: #2675
8af104a16e