feat: When search is pressed from a user's profile prefill from: <username>

[blowdart]

Describe the feature you'd like to request

When search is pressed from a user's profile prefill 'from: '` in the search box to narrow searches to posts from that user.

Describe the solution you'd like to see

Prefill from: <username> in the search box

Additional information

No response

[mozzius]

I had the same thought - will definitely be doing this!

[blowdart]

You could do it at the same time as #110 :D