Edit/Delete message available?

I accidentally submitted my topic instead of previewing it.

After unsuccessfully searching for an option to edit my topic, I didn't 
seem to be able to edit the misspelled version, so I created a second 
one and added a comment to my first topic to ignore and reply to my 
other thread.

Then I noticed that my second version (the correct one) was 
automatically removed from the Topics list. So, since I don't seem to be 
able to edit or delete comments, I added a second comment suggesting to 
reply to that topic again.

That seems much of an unnecessary fuss to me.

Can you please either tell me where to find options to edit/remove a 
comment/topic, or please add this functionality.

Thanks.