[twitter] prioritize tweet type checks (mikf#3439)

Do not consider a tweet seen before applying 'retweet', 'quote' and
'reply' checks. Otherwise the original tweets will also be skipped if
the "derivative" tweets and the original tweets are from the same user.

gallery_dl/extractor/twitter.py

@@ -75,11 +75,6 @@ def items(self):
             else:
                 data = tweet
 
-            if seen_tweets is not None:
-                if data["id_str"] in seen_tweets:
-                    continue
-                seen_tweets.add(data["id_str"])
-
             if not self.retweets and "retweeted_status_id_str" in data:
                 self.log.debug("Skipping %s (retweet)", data["id_str"])
                 continue
@@ -97,6 +92,13 @@ def items(self):
                 self.log.debug("Skipping %s (reply)", data["id_str"])
                 continue
 
+            if seen_tweets is not None:
+                if data["id_str"] in seen_tweets:
+                    self.log.debug(
+                        "Skipping %s (previously seen)", data["id_str"])
+                    continue
+                seen_tweets.add(data["id_str"])
+
             files = []
             if "extended_entities" in data:
                 self._extract_media(