391 device management ability to authorize new device

Ticket https://code.vereign.com/code/dashboard/issues/391

javascript/src/iframe/viamapi-iframe.js

@@ -492,12 +492,12 @@ const connection = Penpal.connectToParent({
           identity.pinCode = newPinCode;
           await setIdentityInLocalStorage(identity);
 
-          encodeResponse("200", null, "Successfully changed pincode");
+          return encodeResponse("200", null, "Successfully changed pincode");
         } else {
-          encodeResponse("400", null, "Identity not found");
+          return encodeResponse("400", null, "Identity not found");
         }
       } catch (e) {
-        encodeResponse("400", e.message, "Change pincode error");
+        return encodeResponse("400", e.message, "Change pincode error");
       }
     },
     getIdentityProfile(identityKey) {