Use media endpoint for profile media tab

This bypasses "search" rate limits. It now includes media beyond
images and videos (eg. YouTube links are "media"), but the old
behaviour can be restored by clicking search, then filtering "Media"
and excluding retweets and replies.

src/api/list.nim

@@ -21,10 +21,7 @@ proc getListTimeline*(username, list, agent, after: string; media=true): Future[
   if result.content.len == 0:
     return
 
-  let last = result.content[^1]
-  result.minId =
-    if last.retweet.isNone: $last.id
-    else: $(get(last.retweet).id)
+  result.minId = getLastId(result)
 
 proc getListMembers*(username, list, agent: string): Future[Result[Profile]] {.async.} =
   let