"View file" in PRs should point to the branch, not the commit #2260

1. Visit https://github.com/sindresorhus/refined-github/pull/2259/files
2. Click "View file" in the dropdown of any file
3. You'll be redirected to https://github.com/sindresorhus/refined-github/blob/0ae4f89ff9980db11a0d5d67ebb0b684230a5249/source/options.css

You're viewing a file in a PR on a different fork, but it's still shown as part of the origin repo. This has a big flaw: you can't edit any files from this view, for example if you navigate to its sibling source/options.html file you'll be on page https://github.com/sindresorhus/refined-github/blob/0ae4f89ff9980db11a0d5d67ebb0b684230a5249/source/options.html

How to code this feature

• This feature should probably be called fix-view-file-link-in-pr
• You can fix the URL on demand (when the menu is opened) like revert-file does: https://github.com/sindresorhus/refined-github/blob/0ae4f89ff9980db11a0d5d67ebb0b684230a5249/source/options.css