Change the design of the post content in add reaction window

[Eldenroot]

I know, it is a testing version and many changes will come hen you have some spare time.

This will need a a little love - it looks ugly when you add reactions to the post with quotes or html tags - it shows text in a source mode.

I dont know how to change it, it is quite useful. Maybe you can add a username, avatar and formatted text. It is up to you, I will try to figure out and give you some ideas if you wish.

[MattRogowski]

Just stripped all the MyCode so it's a plaintext message - want to try and keep it as clean as possible really regarding adding anything else in.

[Eldenroot]

Yeah, I was thinking about this. Good job, I will test the new GitHub version in the evening

EDIT: hr tags from post merge is not parsed, anything else is fine