Topics in app.js removed

There was some lines there that allowed you to rename the topics. I am pretty sure they were there last week. Can you add them again?

I'm sorry. I was looking at the wrong file.

Start by inspecting app.js, but note that the reporter says they were looking at the wrong file and provides no replacement path or reproduction. Confirm whether topic renaming is actually missing before changing anything; the issue does not define a verifiable done state.

Written by the indexing model from the issue text.