Adding 'posted' icon

[kwblue]

Hello,

I would really like to add an icon, much like the 'subscription' (you are subscribed checkmark) icon. I would like one in the same place that shows the user if they have posted in that thread.

So, in a topic/thread view, there should be a checkmark (if subscribed) and some other icon (if they posted).

I couldn't find anything like that and have no idea where to start.

Thanks!