[Feature request] Add an option to always open new tabs inside the currently open tab group

Is your feature request related to a problem? Please describe.

This was the default behaviour in the old Opera when they introduced tab groups for the first time long time ago, and as far as I remember, it also used to be the default behaviour in Chromium when tab groups were still at their experimental stage, but they have changed it later to the current behaviour. Basically, right now when opening a new tab while having a tab group open, the tab is created outside the group. This is annoying because in order to move such a tab back to the group one needs to either use the mouse or rely on complex keyboard shortcuts to change its position manually. On top of that, there doesn't seem to exist any quick shortcuts to simplify such a manual process.

Describe the solution you'd like

I would like to either have an option to make new tabs automatically open inside the currently open tab group, or alternatively be able to set a custom keyboard shortcut to do it.

Describe alternatives you've considered

I've tried using AutoHotkey in Windows to send multiple keyboard shortcuts in order to the browser, so that a new tab would automatically be created and moved to the current tab group. It didn't really work very well, unfortunately, because there were too many commands send one after another, and even a slight lag or delay in the browser caused the whole script to fail (often causing various side effects, such as closing an unrelated tab or similar).

Additional context