Fix off-by-one error in repo tags pagination

Fixes #1665

data/model/tag.py

@@ -203,12 +203,14 @@ def list_repository_tag_history(repo_obj, page=1, size=100, specific_tag=None):
            .where(RepositoryTag.repository == repo_obj)
            .where(RepositoryTag.hidden == False)
            .order_by(RepositoryTag.lifetime_start_ts.desc(), RepositoryTag.name)
-           .paginate(page, size))
+           .limit(size + 1)
+           .offset(size * (page - 1)))
 
   if specific_tag:
     query = query.where(RepositoryTag.name == specific_tag)
 
-  return query
+  tags = list(query)
+  return tags[0:size], len(tags) > size
 
 
 def revert_tag(repo_obj, tag_name, docker_image_id):