Error description with the message from the server during URL validation contains excessive escaping

[TheSomeMan]

In order to test it, you need to enable custom HTTPS and try to check URL "https://network.ruuvi.com/record2". The server will return an error message like this:

{"message":"Not Found"}

This message should be properly escaped when displaying in UI:

HTTP response status: 404, Message from the server: {"message":"Not Found"}

The previous build generated extra escaping like this:

HTTP response status: 404, Message from the server: {\"message\":\"Not Found\"}

[markoaamunkajo]

QA passed