[Improvement] Open Them All could target a "tab group"

[frivard-coveo]

This is a little improvement that I would like, let me know what you think.

I am an Edge browser user; the browser has the concept of Tab Groups. When I already have many open tabs, using "Open Them All" adds too many tabs and they get lost in the noise.
I would like to have the option to open the PR is a specific tab group, say the one named "PR Monitor". That way it's cleaner and more focused.

[fwouts]

Sounds like a useful feature, feel free to send a PR!