Unless I'm misunderstanding your comment, this feature is actually included in the latest EAP/beta releases[1]. There is discussion of it at the bottom of the issue you linked.
Yes, that's it. Judging from the screencast, I will continue using lazygit for that though. Not a fan of all the clicking. Hopefully there will be a keystroke available for it.
[1] https://blog.jetbrains.com/idea/2023/06/intellij-idea-2023-2...