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/Models/FollowingModel.swift

@@ -60,7 +60,7 @@ class FollowingModel {
             switch nev {
             case .event(_, let ev):
                 if ev.kind == 0 {
-                    process_metadata_event(profiles: damus_state.profiles, ev: ev)
+                    process_metadata_event(image_cache: damus_state.image_cache, profiles: damus_state.profiles, ev: ev)
                 }
             case .notice(let msg):
                 print("followingmodel notice: \(msg)")