The button cannot remember the previous options

[ffbh123456]

• Gitea version (or commit ref): 1.14.0+dev-265-g742e21aeb built with GNU Make 4.3, go1.15.5
• Git version: 2.28.0
• Operating system: macOS 11.0.1
• Database (use [x]):
  • PostgreSQL
  • MySQL
  • MSSQL
  • SQLite
• Can you reproduce the bug at https://try.gitea.io:
  • Yes (provide example URL)
  • No

Description

In the interface of PR Review, I set ignore whitespace when comparing lines, but when I close the browser page and reopen the page, this becomes Show all changes again. I hope this button can stay in this state. Because now I need to reset this option every time I open this page