Duplication of event types, duplication of listeners (after double authorization), and wrong display of sent events in ws testing tool

[michaelKurowski]

• Event types to send are displayed two times in ws test tools
• Sent event's body is displayed as "[object Object]"
• Listeners duplicate after authorizing 2 times

[michaelKurowski]

@MarcinGrzeszczak I think that you did fix it. Isn't it?