[UI] Improve how to change from one user to other in the wallet

[ghost]

Right now is confusing how to change from one user to other in the wallet. Since a big redesign will be don, for the MVP the consensus is that:

• In the list of identities mark with a special border the current user in the app
  • In the list of identities place a "tag" with the "SELECTED" string
  • In the list of identities change the arrow down to show more info to a string such as "More information"

[ghost]

Fixed