[trello.com/c/vawidi4o] Add UI for Secret Wallets and combine it with a new secret wallet service

[Lainaaa]

More info available by task link.

For managing secret wallets uses alert menu.

For my view it does not need to be explained even while it looks as big PR. If you would have any questions I am open for that!

Please, take a look at my secret wallet factory because i am not sure about its implementation.