Users seem to use the [Post your answer] as a reply often

## Context

I observe that users are often using the `[Post your answer]` as a reply to an answer, not understanding that this option is to answer a question. E.g. the following happens:

* User creates new question
* The question is answered, sometimes requesting for some more feedback if it does not solve the issue.
* The user has feedback, but instead of using the `[Add comment]` option, he / she uses the `[Post your answer]` thinking it is to reply to the previous answer.

I think the reason is because the Your Answer form is immediately displayed, where the `[Add comment]` option requires an additional click to show the form. Thus users are missing that they are using the wrong form.

Examples:

* https://support.chirpstack.io/questions/10010000000000877/device-no-longer-receives-multicast-payloads
* https://support.chirpstack.io/questions/10010000000000872/chirpstack-does-not-receive-gateway-data

## Describe the solution you'd like

Maybe an additional check should be added when the user of the question is the same as the user trying to press the `[Post your answer]`. Something like Only use this field to answer your own question. To reply to an answer please use the `[Add comment]` button.

Alternatively, maybe it should be made a bit "harded" to self-answer a question. E.g. when the user of the question and the user trying to answer is the same, do not show the Your Answer form but add a Button to expand it + making the user aware that it should only be used to answer the question, not to reply.