app.show_collection: rewrite if small collection part to using one if

server/app.py

@@ -440,18 +440,15 @@ def show_collection(collection_id: int) -> ResponseReturnValue:
     collection: MediaCollection = MediaCollection.get(id=collection_id)
     if collection is None:
         return make_response(f"Not found", 404)
-    media_links = (
+    media_links = None
-        MediaCollectionLink.sorted(
+    media_titles = None
+    if orm.count(collection.media_links) <= SMALL_COLLECTION_MAX_COUNT:
+        media_links = MediaCollectionLink.sorted(
             MediaCollectionLink.select(lambda l: l.collection == collection)
         )
-        if orm.count(collection.media_links) <= SMALL_COLLECTION_MAX_COUNT
+        media_titles = remove_common_trails(
-        else None
+            [link.element.title for link in media_links]
-    )
+        )
-    media_titles = (
-        remove_common_trails([link.element.title for link in media_links])
-        if media_links is not None
-        else None
-    )
     return render_template(
         "collection_element.htm",
         collection=collection,