Adding contacts - feature request

[DavidMS73]

To add a contact in the application the user must manually input the name of the contact and provide the address of the contact. This process must be performed even if the user had already performed a transaction with the user they want to add as a contact. The improvement would simply consist of adding the possibility of choosing to add a user as a contact after performing a transaction. This would reduce the time required for adding different contacts. It would prevent having to enter the address manually every time the user wants to add a contact.