Opening a PR is forcing editor group changes

[joaomoreno]

Testing #8536

1. Start with an empty view
2. Open a PR
3. Open another
4. Move the second one to the right, two editor groups
5. Back in the PRs view, click the second one

🐛 Second PR will move back to the first editor group.

Screen.Recording.2026-02-24.at.09.10.42.mov