"unstar" + "unwatch" breaks the UI

[kolaente]

• Gitea version (or commit ref): latest
• Can you reproduce the bug at https://try.gitea.io:
  • Yes, just go to any repository, star it and change the language to one which doesnt work (see below)

Description

If the UI's language is one of the following:

• Deutsch
• Pусский
• Español
• Polski
• български
• Cрпски
• Svenska
• Cрпски

Starring a repo breaks the UI (see below).

Screenshots

This is how it should look like:

This is how it looks: