Hide outdated comments in pull requests comparisons

[dkline]

• Gitea version (or commit ref): 36e7cb9
• 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

Steps to reproduce:

• Make a PR
• Add an inline comment to the PR
• Update the code in the PR (update the same file and code area, throw some new lines at the top of the file as well to show the full issue.
• Push the changes to the branch (my workflow uses rebases to squash the new commit and force push to branch)
• View the PR in gitea
• Note, the comment tab correctly hides the comments (they are there but collapsed and marked as outdated)
• Looking at the files changed tab, the comments are still there, and are associated to the wrong line of code.

My suggested fix: Don't show any outdated comments on the PR diff.

Screenshots

Comment tab showing outdated comment on correct line of code:

File changes tab showing outdated comment on incorrect line of code (and where the correct code would be in this case):