Empty repository topic tag after clearing topics

[bugreport0]

• Gitea version (or commit ref): 1.1.0+1207-g139ebf80
• Git version:
• Operating system:
• Database (use [x]):
  • PostgreSQL
  • MySQL
  • MSSQL
  • SQLite
• Can you reproduce the bug at https://try.gitea.io:
  • Yes (provide example URL)
  • No
  • Not relevant
• Log gist:

Description

After clearing (removing all) topics in a repository header, an empty topic tag is shown. It disappears on reload. However, an empty tag is always shown in a user's repository overview with no apparent way of clearing all topics.

Screenshots

The empty topic tag after editing:

Empty topic tags in repository list: