[UX] Be able to send the whole balance of an account
Adding a "max" toggle to allow a user to send his whole balance of Eth/token. The "amount" sent should be disabled (so that the user can't change it) and calculated according to the chosen gas.
Adding a "max" toggle to allow a user to send his whole balance of Eth/token. The "amount" sent should be disabled (so that the user can't change it) and calculated according to the chosen gas.