[Bug] Profile screens only load 3 posts

[setch-l]

Steps to reproduce: Build 290 or 297

1. Open Nos on a mac

2. Search for Meredith Whittaker npub15s3hussvmv9nyvw3w8lg0x72udazmdat7tcj5vmmjafnwcvv8tpqzz6r6y
   Issue: only her 3 most recent posts load.

3. Open Nos on a mac

4. Search for We Distribute

5. Scan their list of profile posts for the one they wrote about Nostr
   Issue: only the three most recent posts load.

6. Pull to refresh looks like it is doing soemthing but then older posts do not load.

Expected: If I pull to refresh the page then the app so go grab more posts on the network.

[mplorentz]

This bug happens if the user posts 20 replies (or deletes) in a row without publishing a new root note. The problem is that the PagedRelaySubscription won't be told to load the next page because no cells were added to the PagedNoteDataSource from the previous page when the "Notes" tab is selected on the profile screen. A workaround is to select the "Activity" tab - it pages fine.

I'm working on a fix.