pfps: load profile pics in the background

So we don't get annoying popping artifacts when scrolling

Changelog-Fixed: Profile pics are now loaded in the background
Signed-off-by: William Casarin <jb55@jb55.com>

damus/Views/SearchHomeView.swift

@@ -70,7 +70,7 @@ struct SearchHomeView_Previews: PreviewProvider {
         let state = test_damus_state()
         SearchHomeView(
             damus_state: state,
-            model: SearchHomeModel(pool: state.pool, profiles: state.profiles)
+            model: SearchHomeModel(damus_state: state)
         )
     }
 }