Add logout function to exisiting sdk wallets

Author: lnbc1QWFyb24

src/modules/select/wallets/portis.js

@@ -34,6 +34,7 @@ function portis(options) {
         interface: {
           name: "Portis",
           connect: provider.enable,
+          disconnect: () => portis.logout(),
           address: {
             onChange: func => {
               portis.onLogin(address => {