Code attachment does not update with up/down prompt navigation

[Jurredr]

Problem:

When navigating up / down in prompt history, the code attachments are supposed to update accordingly, but they don't. This used to work fine.

Steps to Reproduce:

Add a code attachment (e.g. by sending to Q from VSCode), navigate to a previous prompt with up arrow, and it will not update the attachment section accordingly.

Expected Behavior:

The code attachment should correspond to the selected prompt (in history).

Other details:

Francesco: "i am pretty sure its this line here that has been removed, i havent tested yet:
https://github.com/aws/mynah-ui/pull/214/files#diff-bd4c5481ffce0a6058196b3d09baac811eb95bae5f07b53a61ff3cdf3658323fL334"

[Jurredr]

Fixed in #222