TUI - known account functionality and display of list

Now:

1. A user has to mark an account as a known to make account known. He can do it during Onboarding (own account), making operations (receivers) or in the Configuration/Accounts Management/ Tab: Known accounts.
2. How it works?
   When a user checks the checkbox Known, the account is added to Known account and the text is changed from unknown account to known account

Discussed solutions:

1. The control Account name + checkbox should work different. The account should be added to the known accounts list not after marking a checkbox, but after next action, so in case of making a operation or onbording process, it would be after leaving a screen.

2. The all used accounts (working account, watched accounts and the receivers of operations) should be known account by default. It should be possible to remove a known account from a list from Account management screen. In this solution, the checkbox Known is not needed.